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1) He is very slow, so we won't give his such an important task.
-> If he isn't slow, we will give his such an important task.
2) If you don't promise to try harder, i won't help you
->Unless you promise to try harder, I won't help you.
3) If didn't win a big prize in a lottery, i wouldn'tgive up my job
->Unless I won a bif prize in a lottery, I wouldn't give up my job.
4) Bill failed the test because he didn't study carefully
->If Bills had studied carefully, he wouldn't have failed the test.
5) The dress is very expensive, so she can't but it ( ở đây chắc là buy =))
->If the dress were cheap, she could buy it.
6) She wasn't able to answer the questions, so she failed the exam
->If she had been able to answer the questions, she wouldn't have failed the exam.
7) If he doesn't study hard, he won't get good mark
->Unless he studies hard, he won't get good mark.
8) He doesn't get a job, so he can't pay his bills
->If he gets a job, he can pay his bills.
9) Save your money or you won't be able to buy the house
->If you save you money, you will be able to buy the house.
10) We missed the train because the clock wasn't right
->If the clock had been right, we wouldn't have missed the train.
#Chúc_bạn_học_tốt_jasss
Đáp án C
Dịch: Anh ấy không thể thực hiện môn lặn có bình dưỡng khí vì anh ấy yếu tim.
Đáp án: D