. He hesitated about the brake, otherwise the accident ______.
| A．could have been avoided | B．could have avoided |
| C．would have avoid | D．should have been avoided |
Few houses in the village were left ______after the earthquake.
| A．to stand | B．stand | C．standing | D．stood |
It was so dark in the cinema that I could hardly ______ my friends.
| A．turn out | B．bring out | C．call out | D．pick out |
Those who are ______ their present situation will surely make no more advance in life.
| A．content to | B．satisfied of | C．pleased to | D．content with |
All her energies are ______upon children and she seems to have little time for anything else.
| A．guided | B．aimed | C．directed | D．focused |
At times the balance in nature is ______，resulting in a number of possibly unforeseen effects.
| A．troubled | B．confused | C．disturbed | D．puzzled |