---Someone is knocking at the door. Who may it be?
---It ______ be Tom. He is still in the school.
| A．can’t | B．mustn’t | C．couldn’t | D．may not |
The population of Shanghai is larger than _____ of Shenyang.
| A．that | B．it | C．one | D．this |
—Have you seen my brother?
—Yes. I _____ him in the library five minutes ago.
| A．met | B．have met | C．meet | D．have been met |
—_____ my daughter is only ten years old, she knows a lot.
—What a clever girl!
| A．Because | B．Whether | C．Though | D．So |
The family was _____ poor _____ they couldn’t buy a TV set.
| A．so ; that | B．not; until | C．not ; but | D．so ; but |
—Does your father still smoke?
—No, he has succeeded in_____ smoking for three years.
| A．giving up | B．give up | C．gives up | D．gave up |