A:look
B:look at
C:look after
D:look out
历史兴趣小组的同学要去实地考查辛亥革命的首发地,他们应该去( )
求证:AB=AC.
关于我们生活的亚洲,描述正确的是( )
—The man at the gate _______ be our headmaster. He is always standing there every morning.
—No, it _______ be him. He is holding a meeting in the office now.