Ipromisedtogettherebefore5o’cl-优题课

I promised to get there before 5 o’clock, but now the rain is pouring down. They _______ for me impatiently.

A．may wait	B．ought to wait
C．could wait	D．must be waiting

科目英语题型单选题难度中等

知识点：情态动词

Before the problem can be solved，it must be obvious ________ the problem itself is.(2011·湖南，31)

His writing is so confusing that it's difficult to make out ________ it is he is trying to express.(2011·安徽，33)

It is by no means clear ________ the president can do to end the strike.(2012·新课标全国)

________you said at the meeting describes a bright future for the company.

From space, the earth looks blue.This is ________about seventy－one percent of its surface is covered by water.