The problems, _____ properly, will seriously affect the relations of nations.
| A．not solved | B．if not s olving |
C．if not solved | D．if not to solve |
Of the two brothers, Bill is ______ younger one, and he is a quiet boy, ______ that most adults like very much.
| A．the; one | B．a; the one | C．a; one | D．the; the one |
—I heard Tom was badly injured in the football match.
—, let’s go and see him.
| A．If ever | B．If so | C．If not | D．If any |
I ran all the way to school yesterday, otherwise I late for the annual talent show.
| A．was | B．had been | C．would be | D．would have been |
Can you tell me the difference between the words “require” and “request” ? I sometimes get puzzled by their meanings.
| A．arbitrary | B．clumsy | C．apparent | D．tentative |
The boss refused to sell the car for he thought was not satisfactory.
| A．what | B．that | C．which | D．how |