17000 bài tập tách từ đề thi thử môn Tiếng Anh có đáp án (Phần 3)

Mike won five medals at the competition. His parents very proud of him.

421/1620

Mike won five medals at the competition. His parents _____________ very proud of him.

could have been

can’t have

can’t be

must have been

Giải thích

Chọn D