Hewantstobeasinger，andheisgoodat

问题详情：

He wants to be a singer，and he is good at ______.

A．sing                                                          B．to sing

C．singing                                                     D．sings

【回答】

C　点拨：be good at中的at是介词，故其后接动词­ing形式，C项正确。

知识点：动词和动词短语

题型：选择题