The novel was completed in 1978， the economic system has seen great changes．
| A．when | B．during which | C．since then | D．since when |
A successful scientist needs _____ if he wants to make hypothesis (假设) of how processes work and how events take place.
| A．permission | B．penetration | C．imagination | D．convention |
This year the farmers were just able to gather in the _____ before the fine weather came to an end.
| A．collection | B．harvest | C．flower | D．plant |
He hated the war so much that he decided to leave the army _____.
| A．for long | B．once in a while | C．for good | D．once upon a time |
We suddenly saw the bus about to leave and had to run _____ to catch it.
| A．hardly | B．awkwardly | C．hard | D．strongly |
If we can _____ our present difficulties, then everything should be all right.
| A．get off | B．come across | C．come over | D．get over |