mn giải chi tiết dùm em câu này vs ạ cosx.cos2x-sinx.sin2x=1

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TENSES 1.I ………………………… ( clean) my teeth three times yesterday. 2.It was hot in the room so I ………………………… (open) the window. 3.The accident ………………………… (not happen) last Sunday. It ………………………… (happen) yesterday. 4.Where ……………………………………… you (go) last summer? 5.I ………………………… (eat) an orange every day. Yesterday I ………………………… (eat) one. 6.Ann’s grandfather ………………………… (die) when he was 90 years old. 7.You ………………………… (go) to the concert last night ? 8.We usually ………………………… (go) to the cinema on Sundays . 9.You ………………………… (do) a lot of homework last night? 10.Jim came into the room, ……………………… (take) off his coat and …………………… (sit) down. 11.Why ………………………… you (be) late this morning? 12.Where ………………………… Chris and Ann (be) last week? 13.The weather ………………………… (be) nice last week? 14.I ………………………… (not watch) TV very often . 15.Martin ………………………… (not usually drive) to work . 16.A: What time ………………………… your father (finish) work in the evenings? B: He often ………………………… (finish) work at 6 . 17.Sarah is tired. She ………………………… (want) to go home now. 18.Sue ………………………… (not like coffee. She …………………………. (prefer) tea . 19.It often ………………………… (snow) here? 20.You always …………………………. (get) up early? 21.Jane ………………………… (live) in a big city? 22.My children ………………………… (not like) oranges. They ………………………… (like) apples. 23.Sandra ………………………… (speak) Spanish but she …….............. (not speak) Italian. 24.He ………………………… (catch) the bus every morning. 25.I ………………………… (play) tennis yesterday but I ………………………… (not win) 26.We ………………………… (go) to the cinema but the film ………………………… (not be) good. We ……………………… (not enjoy) it. 27.You …………………………………… (arrive) in Hanoi the day before yesterday? 28. A: What ……………………… you (do) yesterday afternoon ? B: I ……………………… (do) the housework. 29.Ted ………………………… (be) at work yesterday ? 30.Today the weather ………………………… (be) nice but yesterday it …………………………. (be) very cold. 31.This time last week, I ………………………… (be) in Paris. 32.I like your new jacket . It ………………………… (be) expensive? 33.They ………………………… (enjoy) the party last night. They ………………………… (dance) a lot and ………………………… (talk) to a lot of people. 34.I ………………………… (see) a good film last night. 35.I ………………………… (see) Mai yesterday morning but I ………………………… (not see) Lan. 36.They ………………………… (drive) to Monaco every summer. 37.She usually ………………………… (go) for a walk in the morning. 38.We ……………………………… (not have) time to visit the Eiffel Tower last week. 39.They ………………………… (not be) in Japan last year. 40.Jane …………………………………… (send) you a letter last month? 41.Where you ……………………………………… (live) ten years ago? 42.They …………………………… (be) in Iceland last January? 43.He ………………………… (play) the piano when he ………………………… (be) a child. 44.You ………………………………… (play) the piano when you were young? 45.We always ………………………… (have) roast beef on Sundays when I was a boy.