—Jack can't concentrate on his lessons recently.—Yes, that might ____ why he did so badly in the last test.
His pale face suggested that he _________ frightened.
We are all for your suggestion that the meeting _________.
—The experiment had failed. —I suggest you _________ again.
—Tom was late for the meeting. —_________ As far as I know, he set out very early.
It is a _________ in China to have some tea or other drinks before the meal is served.