I used to drink a lot tea but these days I ________ coffee.

问题描述:

I used to drink a lot tea but these days I ________ coffee.
A.prefer
B.preferred
C.have preferred
D.am perferring

选A
首先,prefer(更喜欢)是属于“状态动词”,不能用于进行时,所以排除D
其次,根据意思理解,前半句used to强调过去常常做某事,而后半句用these days(现在,目前),用于现在时.