______time went on, the people in the area came to realize how serious the environment had been polluted.
| A．As | B．With | C．When | D．While |
You _______ use your cell phone here in our hospital because of the disturbance to the electronic equipments! It’s forbidden.
| A．shouldn’t | B．may not | C．needn’t | D．mustn’t |
——Don’t look down upon Bob. He has his own advantages.
——Oh, yes.________ others are weak, he is strong.
| A．If | B．Where | C．Though | D．When |
Alice left the company half a month ago. Her work______unfinished since.
| A．has left | B．was left | C．is leaving | D．has been left |
In order to support the big family, he worked so hard that_______ he made himself ill.
| A．occasionally | B．purposefully | C．normally | D．eventually |
While he was at________college, he took part in political activities, and was soon thrown into prison.
| A．the; / | B．/; the | C．/; / | D．the; the |