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hoangkshmr
2 năm trước
Câu 1: Trong các trường hợp sau, dòng điện chạy trong những vật nào? a. Đũa thủy tinh đã được cọ xát vào lụa. b. thanh nhựa sẫm màu đang cọ xát vào len. c. Quạt máy đang chạy. d. Viên pin nhỏ đang đặt trên mặt bàn. e. Máy tiện đang hoạt động. f. Đồng hồ điện tử đang hoạt động. Câu 2: Trong các chất sau đây: bạc, dung dịch đồng Sunfat, giấy, thép, thủy tinh, đồng, bê tông, than chì, sứ, nhựa. Chất nào là dẫn điện, chất nào là chất cách điện.
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Các câu hỏi liên quan

SIMPLE PAST AND PAST CONTINUOUS 1) What …………………… (you/do) when I ………………….(call) you last night? 2) I ………………….(sit) in a cafe when you ………………….(call) 3) When you ………………(arrive) at the party, who ………………..(be) there? 4) Susie ………………….(watch) a film when she …………………..(hear) the noise 5) Yesterday I …………………..(go) to the library, next I …………………….(have) a swim, later I ……………………(meet) Julie for coffee 6) We …………………..(play) tennis when John ……………………..(hurt) his ankle 7) What …………………..(they/do) at 10pm last night?- it was really noisy. 😎 He …………………..(take) a shower when the telephone ………………….(ring) 9) He ………………(be) in the shower when the telephone ………………..(ring) 10) When I …………………(walk) into the room, everyone …………………….(work) 11) It …………………(be) a day last September. The sun …………………(shine)and the birds …………………(sing) . I ……………………(walk) along the street when I………………..(meet) an old friend. 12) He ……………………..(live) in Russia when the Revolution ……………………….(start) 13) When her train …………….(get) to the station, we ………………(wait) on the platform. 14) He ……………….(be) so annoying! He ………………(always leave) his things everywhere. 15) On holiday we ……………………(visit) Rome, ……………………….(see) the Vatican, and ………………………(spend) a few days at the beach. 16) Why ……………….(you/stand) on a chair when I …………………….(come) into the room? 17) They …………………………(live) in Germany when they ………………………… (be) young. 18) At 7pm yesterday, we ………………………… (listen) to music.. 19) He ……………………… (sleep) when the doorbell ………………………… (ring). 20) We ………………… (eat) dinner at 8pm last night (we started eating at 7:30).. 21) Yesterday I ………………………… (go) to the Post Office, ………………………… (buy) some fruit at the supermarket and ………………………… (read) a book in the park in the afternoon. 4) We ………………… (watch) TV when we …………………… (hear) a loud noise. 5) Julie …………………… (be) in the garden when Laurence …………… (arrive). 6) A: What ………… (you/do) at 3pm yesterday? B: I ………………… (clean) my house... 7) Last year I ………………………… (visit) Paris and Rome.. 😎 They ………………………… (have) dinner when the police ………………………… (come) to the door. I. Put the correct form of the verbs 1) He ……………………… (sleep) when the doorbell ………………………… (ring). 2) We ………………… (eat) dinner at 8pm last night (we started eating at 7:30).. 3) Yesterday I ………………………… (go) to the Post Office, ………………………… (buy) some fruit at the supermarket and ………………………… (read) a book in the park in the afternoon. 4) We ………………… (watch) TV when we …………………… (hear) a loud noise. 5) Julie …………………… (be) in the garden when Laurence …………… (arrive). 6) A: What ………… (you/do) at 3pm yesterday? B: I ………………… (clean) my house... 7) Last year I ………………………… (visit) Paris and Rome.. 😎 They ………………………… (have) dinner when the police ………………………… (come) to the door. 9) He ………………………… (work) in the garden when he ………………………… (find) the money. 10) Laura ……………………… (study) at 11pm last night. 11) I …………………………………. (walk) along the road when I …………………………………. (meet) an old friend. 12) It …………………………………. (be) a day in December. Snow …………………………………. (fall) , children…………………..(sing) carols and people …………………………………. (do) their Christmas shopping..... 13) My ex-boyfriend …………………………………. (be) so annoying! He …………………………………. (always miss) the bus and arriving late... 14) When I …………………. (call) Julie, she …………………………………. work)... 15) Why …………………………………. (cry) when I …………………………. (arrive)?.. 16) When he …………………………………. (get) home, we started to eat dinner.. 17) At 10 am yesterday, I …………………………………. (sit) on a bus.. 18) I …………………………………. (enjoy) my book so much that I …………………………………. (not/notice)that the train had stopped... 19) David …………………………………. (not/sleep) when I …………………………………. (arrive) , he……………………. (study). 20) Mr Black …………………………. (not/work) in the garden at 10pm last night.. II. Put the correct form of the verbs 1. While they ……………………………… (travel) to China, Marco ……………………. (keep) a diary. 2. Mrs. White …………………………………. (drive) past a house in Main Street when she……………………… (see) the ground floor on fire. 3. While he ………………………………. (fly) off the Miami Coast, the pilot ……………..(see) sharks approaching the swimmers. 4. The fireman ……………………………… (fight) the fire on a balcony below when he………………………… (hear) someone’s shouts. 5. She …………………… (die) while she ………………………….. (run) after a bus. 6. We ……………………………….. (have) dinner when the electricity ……………………(go) off. 7. She ………………………………… (think) of something else while you ………………..(talk) to her. 8. I ……………………….. (see) her while I …………………………………. (look) out of the window. 9. While the teacher ………………………………….. (talk), the students …………………..(look) at an insect on the ceiling.

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