mọi người giúp mk vs m.n ơi!!!!!!! Mai cô kiểm tra rồi...
viết lại câu sao cho nghĩa ko thay đổi :
1. When did you study English? (How long)
2. They began building this house 2 months ago. (They have)
3.My father started to work in this factory last week. (My father has)
4. How long has he worked in the garden? (When)