Thebossdidn'tlikeJamesbecausehewasnot

问题详情：

 The boss didn't like James because he was not _________learning new things.  

A. afraid of                        B. worried about    C. tired of                                   D. good at

【回答】

D

解析：be good at 意思是“擅长，在某方面做得好” ，与句意相符。

知识点：动词和动词短语

题型：选择题