Iusedtobeafraidtospeakinfrontofpublicbefore,butrecentl...

问题详情：

 I used to be afraid to speak in front of public before, but recently I _____ a lot.

   A. have improved     B. improved           C. will improve             D. am improving

【回答】

A

知识点：动词时态

题型：选择题