Ruồi giấm thực hiện giảm phân tạo ra trứng và tinh trùng .Hãy tính số tinh trùng và trứng tạo ra khi có 12 tế bào mầm( tế bào sinh dục buóc vào vừng chín) thực hiện giảm phân. - Số trứng... -Số tinh trùng...

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1. She saw somebody ____________ through the window. A. jump B. jumps C. to jump D. jumped 2. It was so kind of you ____________ me ____________ the problem. A. help/ solve B. to help/ solving C. to help/ solve D. help/ to solve 3. Her mother will never let you ____________ her daughter. A. married B. marry C. to marry D. marrying 4. They have just finished ____________ their hiking trip tomorrow. A. to planning B. to plan C. planning D. plan 5. We all agree ____________ you whenever you are in need. A. help B. helping C. to help D. helped 6. He said he would rather ____________ home than go to that terrible party. A. staying B. stayed C. stay D. to stay 7. My close friend often prefers ____________ to ____________ on weekends. A. fishing/ dancing B. fishing/ dance C. fish/ dancing D. fish/ dance 8. What would you like ____________ when you have some free time? A. do B. doing C. to do D. done 9. Do you still remember ____________ me for the very first time in Ha Noi? A. to meet B. meet C. meeting D. met 10. He forgot ____________ the door when he went out. Someone broke in and stole everything. A. to lock B. locking C. locks D. lock WRITING 1. The policeman allowed her to write a report to his boss.  The policeman let ____________________________________________________ 2. My lawyer said I shouldn’t say anything to the police.  My lawyer advised ___________________________________________________ 3. “Remember to post my letter on your way,’’ Wendy said to me  Wendy reminded_____________________________________________________ 4. After Tommy had finished the house work,he decided to take a rest After having_________________________________________________________ 5. “Thank you very much for telling me the way,’’ she said  She thanked _________________________________________________________