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lananh0607
2 năm trước
Cho hình chóp S.ABCD có đáy ABCD là hình bình hành tâm O , i là trung điểm cạnh SC . A)Chứng minh đường thẳng Oi song song với mặt phẳng ( SAB) và mặt phẳng ( SAD)
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I. Give the correct form of tense in the blank. Ex: She (come)tomorrow morning. She will come tomorrow morning. 1. Hoa always (help)_______________her parents on their farm in her free time. 2. Our summer vacation (start)_______in june and (last)_____for almostt. 3. What do you like (do)_______during your vacation? 4. It''s ten to seven.Hurry up or you (be)________late for work. 5. We (go)_______swimming every afternoon 6. Hoa (have)_____ breakfast with her uncle now. 7. He (not come)_________to the party tomorrow night. 8. They (talk)_____ about Hoa"s work at the moment. II. Give the correct form of comparative in the blank. Ex: Nam is ____than his sister.(tall) Nam í taller than his sister. 1. Mr. Tan works________________hours than my father.(many) 2. Summer vacation is the ___vacation. (long) 3. Vietnamese students have________vacations than American students.(few) 4. He drinks__wine than Mr.Hai. (little) 5. Christmas is one of the_________vacations in America. (important) 6. This old woman has___________money than all of her daughters.(much) 7. Bill is_____than you.(good) 8. These shoes are____________________than those shoes.(expensive)

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