200+ câu trắc nghiệm Câu chủ động và câu bị động có đáp án (Phần 3)

The man died because medical help was not summoneD. A doctor should _____.

4/20

The man died because medical help was not summoneD. A doctor should _____.

be have called

been called

be called

have been called

Giải thích

Chọn đáp án D