答案:aboard

2.It is 　　　　　(认为)that most drivers obey speed limits.

答案:assumed

3.The boy watched the plane until it 　　　　　(消失)from view.

答案:disappeared

4.Will you act as a 　　　　　(证人)to the agreement between us?

答案:witness

5.Do you have enough 　　　　　(证据)to prove that he is wrong?

答案:evidence

6.She couldn't forget the 　　　　　(事件)from her memory.

答案:incident

7.There was a burst of 　　　　　(笑声)in the next room.

答案:laughter

8.Most of the people present agreed to the 　　　　　(建造)of the new airport.

答案:construction

9.警方正在调查那起谋杀案。

答案:The police are looking into the case of murder.

10.汤姆在上班的路上目睹了那场事故。

答案:Tom witnessed the accident on his way to work.

三、用方框中所给短语的正确形式填空

occur to　take charge of　make up　show up　step up　due to　look into　in case　in search of　under construction

1.The accident was 　　　　　careless driving.

答案:due to

2.A working party has been set up to 　　　　　the problem.

答案:look into

3.We had agreed to meet at the gym,but Larry didn't 　　　　　.