It is surprising that he＿＿＿＿at the meeting. 

It is written clearly in the requirements that all passengers ______ check onto board 30 minutes before the plane takes off.

—She looks very happy.She_______have passed the exam.—I guess so.It’s not difficult after all.

At first sight, it ________ look like a generous offer; actually, it is a trick.

Mike is often absent from class.” “Tell him he _________ answer for it if he goes on behaving like that.”