1．Visitors are not permitted ________ the park after dark, because of the lack of lighting.
A．to enter B．entering
C．to enter in D．entering in
答案与解析：A permit sb. to do sth.意为“允许某人做某事”。此题用了被动语态。C项中的in和enter在意义上重复。
2．—________ that he managed to get the information?
—Oh, a friend of his helped him.
A．Where was it B．What was it
C．How was it D．Why was it
答案与解析：C 本句是强调句的特殊疑问句式，由答语知，此句问的是方式，故用how。
