The boys are playing________the edge of the river.
| A．on |
| B．by |
| C．in |
| D．at |
After living in Paris for fifty years he returned to the small town __ he grew up as a child.
A. which B. where C. that D, when
We decided not to climb the mountain because it was raining ___.
| A．badly | B．hardly | C．strongly | D．heavily |
The number of people invited ___ fifty, but a number of them ___ absent for different reasons.
| A．were, was | B．was; was | C．was; were | D．were; were |
Many people agree that ___ knowledge of English is a must in ___ internationsl trade today.
| A．a;/ | B．the;an | C．the; the | D．/; the |
Tom felt that he knew everybody’s business better than they knew it___.
| A．themselves | B．oneself | C．itself | D．himself |