【题目】一When shall we start the restoration of the historic buildings?
一Not until our plan________ by the committee．
A. will be approved B. approves
C. is to approve D. has been approved
在线课程【答案】D
【解析】这题考查时态语态，our plan和approve是被动关系，用被动，选择A或D。A项是一般将来时，not until引导的是时间状语从句，不能用将来时，可以用一般现在时或现在完成时，选D。