我们为国效劳的时候到了。

③-Do you know our town at all?

-No，this is the first time I ________ here.

A.was B.have been

C.came D.am coming

答案　B

解析　句意：--你到底了不了解我们的城市？--不了解，这是我第一次来这儿。This is/was the first/second/third...time that sb have/has/had done sth 这是某人第几次做某事，从句用现在完成时还是过去完成时，需要根据主句用的是is还是was来确定，故选B。

Ⅰ.单词拼写

1.This entrance is in constant(不断的) use；do not block it.

2.Teachers always monitor(监视) students' performance at school.

3.Which button(按钮) do I press to turn the radio on?

4.Why not connect the printer(打印机) with your computer?

5.They attached very great importance(重要性) to the project.

Ⅱ.选词填空

look into，find out，in good condition，at a constant speed，write to

1.She wrote__to him in France.

2.He drove at__a__constant__speed.

3.The car has been well maintained and is __in__good__condition.

4.We must prevent them from finding__out about the plan.

5.Police are looking__into the disappearance of two children.

Ⅲ.完成句子

1.It__has__been__shown that the accident resulted from the driver.

已表明事故的责任在司机。

2.It's about time we__went/should__go__to__the__airport.