A. left    

B. leave    

C. is leaving    

D. leaves

1)chuyển thành câu bi động

he had decorated the house before last Tet

---> the home had been decorated before last Tet.

2) chuyển đổi giữa if và unless

we won't go on holiday unless we have enough money

----> If we don't have enough money, we won't go on holiday.

she can't apply for the job if she doesn't know French

----> Unless she know French, she can't apply for the job.

bn đã quá nha, chúc bn năm mới zz nha