解析：答案A。until引导的状语从句，

主句是一般将来时，其后条件状语从句

应用一般现在时表示将来，主句主语和

谓语之间是动宾关系，故用一般将来时

的被动语态，所以选A。

（三）、现在进行时和过去进行时的被

动语态：am/is/are(was/were)+

being+ done

4. —Have you handed in your

schoolwork yet?

—Yes, I have. I guess it ______now.

[2007 辽宁卷]

A. has graded B. is graded

C. is being graded D. is grading

5. —What’s that noise?

—Oh, I forgot to tell you. The

new machine ______. [2008浙江卷]

A. was tested B. will be tested