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panh22716
2 năm trước
A = 2/(1 x 2x 3) + 2/(2 x 3 x 4) + 2/(3 x 4 x 5) + …………………..+ + 2/(37 x 38 x 39)
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C. Supply the correct tense of the verbs in brackets 1. Trung usually (go) _________ to the library three times a week. 2. Yesterday I (be) _________ busy, so I (not have) _________ time to phone you. 3. Mrs. Trang (not go) _________ to work last week. 4. Where____ you (spend) _________ your summer holiday last year, Tam? 5. You (be) _________ away? – Yes. I (go) _________ to the country last Sunday. 6. They (move) _________ to Ho Chi Minh City in 1990 . 7.Nam enjoys ( play)..........................soccer after school. 8.Lan asked me (go).........................to the supermarket. 9.I think you should (do)...............................the morning exercise. 10.They used (go) ........................................to work by train. 11.You ought to (do)..............................................the homework yourself. 12.Hoa often (do)............................................the homework after school. 13.Mr Hung told me (tell)............................................him the truth. 14.Nga likes ( play)............................................... badminton. 15. He is tall enough ( play)___________ volleyball.

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