—What do you think of the music teacher ?— she is an attractive lady she can be extremely

问题补充：

—What do you think of the music teacher ?

— she is an attractive lady, she can be extremely difficult to work with．

A. If

B. As

C. Because

D. While

答案：

A. If

B. As

C. Because

(答案→)D. While

解析：考查连词，根据句意可知，该句主从句内容相反，所以选择WHILE意为然而，虽然，表对比

句意为虽然她是一个吸引人的女士，但是她可能太难合作了。