Kể lại 1 câu chuyện cảm động em đc chứng kiến ,đc đọc đc nghe về thời kì chống dịch

Giải thích tại sao chọn 1. When he ...... into the office, the secretary a crosswords puzzle. A. came/ was doing B. was coming/ was doing C. was coming/ did D. came/ did 22. Why ... to me while I .... ? A. did you not listen/ was speaking B. were you not listening/ was speaking C. were you not listening/ spoke D. did you not listen/ spoke 3. While I..... for him to call up, he ....a good time in the bar. A. waited/ was having B. have waited/ was having C. was waiting/ have had D. was waiting/ was having 4. They this film lately. A. have seen B. saw C. have been seeing D. were seeing 5. She the picture when I came. A. painted B. has painted C. was painting D. have been 6. She a bath at seven o’clock last night. A. was having B. had C. has had D. has been having 7. She dishes already. A. was washing B. washed C. has washed D. has been washing 8. They supper when the telephone rang. A. had B. have had C. were having D. have been having 9. I you for ages. A. didn’t meet B. haven’t met C. was not meeting D. haven’t been meeting 10. Last summer he to Ha Long Bay. A. has gone B. was going C. went D. has been going

60 đ có tâm tí á đừng viết về truyện kiều ( chỉ viết về nguyễn du thôi ) viết về truyện kiều = báo cáo và 1 sao

Các bạn ơi giúp mình với mình đang gấp

Làm giúp em với ạ!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Bài 1: Tính nhanh. b)1/3+1/9+1/27+...+1/2187 Giải giúp mik với.

1. her water bill is 100000 dong. our water bill is 120000 dong => her water isn't 2. television doesn't cost as much money as internet => internet 3. No provinces in Vietnam are larger than nghe an => Nghe an 4. i've never attended a more joyful festival => it's 5. going to the zoo is interesting, but riding to the countryside is more interesting =>riding to the Mik cần gấp

Giúp Em với Em cần gấp lắm!Cảm Ơn MN

Giải phương trình .................................

Cân bằng PT `Fe_x O_y+HNO_3->Fe(NO_3)_3+N_2+H_2 O`