As a Chinese saying goes, a mountain ______ be too high or an ocean too deep. Therefore, there is no end to our self-improvement.
Who do you think _____ for the failure of their marriage?
Mr Smith gave a notebook away to me. That’s ______ I need badly.
He promised to come early, but he didn’t _____ until 10 p.m.
----Would you please be so kind as to close the window? -----______.
Some people who don’t like to talk much are not necessarily shy; they _____ just be quiet people.