—What do you think we can do for our aged parents?—You do anything except that you visit them as often as possible. don’t have to B. oughtn’t to C. mustn’t D. shouldn’t
We will be shown around the city: schools, museums, and some other places, _______ other visitors seldom go.
The old building, behind _______ was a famous church, was _______ we used to work.
The little time we have together we’ll try _____ wisely.
. When he was working there he caught a serious illness from _____ efforts he still suffers.
. Luckily, we’d brought a road map without ______ we would have lost our way.