My father ______ gave me some exercises and told me to do them ______.

Mary’s score on the test is the highest in her class. —Really? She ______ have studied very hard.

140. Mr. Zhang is such a considerate person______ all his colleagues like to work with.

do you go to visit your grandparents — Once a week.

It is ____ greatpitythat the discovery of flight MH 370 still proves to be ____ failure.