Human facial expressions differ from those of animals in the degree __________ they can be controlled on purpose.
| A．with which | B．to which |
| C．of which | D．for which |
The number of people who _______ invited to the meeting _____ fifty, but a number of them _____ absent for different reasons.
| A．were; was, was | B．was; was, were |
| C．were, was; were | D．were; were, was |
The early pioneers had to _____ many difficulties to settle down on the new land.
| A．get along with | B．go after |
| C．go over | D．go through |
The teacher called Tim’s mother ________ what he had done in the test.
| A．because of | B．because |
| C．since | D．as |
--You are always full of ________. Can you tell me the secret?
--Taking plenty of exercise every day.
| A．power | B．energy |
| C．force | D．strength |
The reason _____ they held a party was _____ it was Sue’s birthday.
| A．why; because | B．why; that |
| C．that; that | D．that; because |