I.Put the verbs in brackets in the present perfect or the simple past tense. 1. We (never watch) that TV programme. 2. We (watch) a good programme on TV last night. 3. He (read) that novel many times before. 4. He (read) that novel again during my last vacation. 5. I (have) a little trouble with my car last week. 6. However, I (have) no trouble with my car since then. 7. I (not see) John for a long time. I (see) him 3 weeks ago. 8. The school bell (ring) . We must go now. 9. I (meet) Mary last night. She (become) a very big girl. 10. He is very thirsty. He (not drink) since this morning. II.Give the correct form of the verbs in the present perfect. 1. Tom (see) this film before. 2. I (finish) my exercise already. 3. They (live) here since 1990. 4. My father (just wash) his car. 5. The students (discuss) the question recently. 6. Mary (never, be) to Ha Noi. 7. We (know) each other for 5 years. 8. So far we (learn) five lessons. 9. We (be) pen pals for a long time. 10. They (stay) here since last week. cần gấp ạ

giúp mình với ạ ! Nhanh giúp mình

Mn xác định biện pháp từ từ của mỗi câu giúp mk vs mk đang cần gấp

Giúp mình với. Vuông pha rồi sao căn k /m = v/x vậy?

giúp mình giải chi tiết câu 3 với ạ

Anh chị gải hộ em bài đọc với hai câu vlc này với

CMR các bth sau luôn có g.trị dương với mọi biến a x^2-8x+20

Giải bất phương trình và biểu diễn nghiệm trên trục số

II. Rewrite the sentences, using conditional sentences. 13. The only reason Jimmy oftens gets marks is because he is lazy => If Jimmy....... 14. We get lost because we don't have a map. => If we..... 15.We don't go on holiday because we don't have enough money => If we..... 16.She don't hurry, so she misses the train => If she........ 17. I buy beef because I don't know she can't eat it. => If I................ 18.If you leave a forwarding address, we will be able to contact you. => Unless....... 19. Unless you save some money, you will never be able to buy a car =_If....... 20. The boys don't have any matches, so they can't light the fire. => If the boys.... 21.The new car is so expensive taht he can't buy it => If.......

Cho y=1/3x^3 -mx^2+(m+2)x-m^2+1 Tìm m để hàm số nghịch biến trên (-2;0) Ai giúp mình với