The boy is only five years old but he is quite used the telephoneA. to answerB. to answe

问题补充：

The boy is only five years old，but he is quite used the telephone．

A. to answer

B. to answering

C. of answering

D. by answering

答案：

A. to answer

(答案→)B. to answering

C. of answering

D. by answering

解析：be /getused to当“习惯于”讲时， to是介词，后接动名词作宾语。故该题选B。以下短语中的to为介词，后面只接动名词： lead to（导致），get down to（开始干）。