动词的分类：行为/实义动词、及物与不及物动词、瞬时与持续动词、状态与动作动词、 助动词、情态动词与连系动词

1. There is someone knocking at/on the door. Who ________ it be?

  A) may            B) will            C) can          D) must

动词填空（写出所给的动词的适当形式）（共5小题；每小题1分，满分5分）

1.Seventy-two hours passed . More than one hundred workers remained _____________(trap) in the coal mine, though fifty had been saved.

2._____________________(determine) to get a seat for the concert, he didn’t mind standing in a queue all night.

3.The bad weather is reported _____________________(contribute) to the passenger plane crash in Iran on January 9.

4.__________________ (experience) many failures, I have the courage to meet all challenges.

5. _________________ (examine) twice a year, whether it is a car or a bus or a truck, is the rule that every driver shall obey in this city.

用方框中所给的动词短语的正确形式填空。

leave sb alone； turn around；   test out；set aside；    ring up；   smooth away   

1. How many people __________________ while I was out?

2.The model must ____________________ before we put it into mass production.

3.__________________, I saw an old friend of mine, whom I haven’t seen for years.

4.She is very upset. _______________ for a few minutes.

5.It’s time for us _________________ our differences and work together for a common purpose.

6.There are still a few problems to be ___________________ before we can complete the project.