chọn đáp đúng cho các câu
1 what ......the children doing?
A. do B. are C. is D. can
2 don't climb the tree because you......fall and break your leg
A.should B. may C. do D. shouldn't
3 what the matter whit.........
A.she B.he C.the D.her
4Mary doesn't go to school ........she has an earache
A. because B.but C.and D.so
5May brother ........a bad backache yesterday
A. has B.had C.have D.haved