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vuhailinh
2 năm trước
Cho P:(bố ) Aa Bb cc × (mẹ )AABbCC a)tính số kiểu giao tử của bố b) tính số tổ hợp ở F1 c)tính kiểu gen AABBCc d)tính tỉ lệ kiểu hình trội trội ,lặn lặn
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I. Choose A, B, C or D to complete the following sentences: 1. I wish Susan ………. harder for her examination. A. will work B. worked C. has worked D. works 2. What were you doing when he …………….? A. comes B. to come C. came D. coming 3. A good letter needs perfect …………. A. introduce B. introduction C. introducing D. introductory 4. It seems difficult for us ……… abroad at the moment. A. go B. to go C. went D. gone 5. There used ……… a movie theater here, but it closed a long time ago. A. be B. to be C. being D. been 6. I come from Vietnam so I am not used to ……….. on the left. A. drive B. drove C. driven D. driving 7. Although we are far away from each other, we still …………. A. keep in touch B. say hello C. keep together D. keep on 8. Music and painting are ………. subjects. A. option B. optional C. optionally D. optioning 9. The children are playing …………… in the schoolyard. A. happy B. happily C. happier D. happiness 10. I wish they ……….. here tomorrow. A. will come B. would come C. come D. came giúp mình với.

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