However,the incident was the only spark_____the fire.
| A．which set off | B．set off | C．that set off | D．setted off |
The president spoke at the business meeting for nearly an hour without ____ his notes.
| A．bringing up | B．looking for | C．referring to | D．trying on |
David worked hard at his lessons ____ he gained high grades in the exams.
| A．so that | B．in order to | C．though | D．because |
As a young man, Zhou Enlai ____ the students movements and later ____ the Communist Party of China.
| A．joined; took part in | B．took part in; joined |
| C．joined in; took part in | D．took part in; joined in |
Camels were ____ better than horses for travelling a long distance.
| A．more | B．far | C．quite | D．very |
When I was in the countryside, I ____ by the riverside every day.
| A．walked | B．was walking | C．walk | D．have walked |