2．You are not permitted________in public places.

A．spitting　 B．spit　 C．to spit　 D．spits

解析：permit sb.to do sth.变成被动语态，应该为sb.be permitted to do sth.，所以答案为C。

答案：C

1．The young man failed ________ and lost interest in ________ of his research.

A．much times；much 　　　B．many times；many

C．many times；much　　 　D．much time；many

解析：time作“次数”讲时，为可数名词；research作“研究”讲时，为不可数名词，只能用修饰不可数名词的much来修饰，因此本题正确选项为C项。

答案：C

10．Keep all your________(收据)for work­related expenses.

答案：struction　2.limit　3.impression　4.destination　5.permit　venient　7.displayed　　 8．explored　9.singles　10.receipts

9．I want to buy two second­class________(单程票)to Shanghai.

8．These ideas will be________(研究)in more detail in Chapter 2.

7．His painting will be________(展示)to the public.

6．It is not________(方便的)for me to come now；I am busy.

5．You break the law if you drive without a driving p________.

4．After a five­day trip，we arrived at our d________.

3．His first speech as president made a strong i________on his audience.