【題目】We shall not start the project until it ____ by the committee.

A. will be approved B. approves

C. has been approved D. is to approve

【答案】C

【解析】句意：在委員會通過之前，我們決不能開始這個項目。until引導時間狀語從句，從句用一般現(xiàn)在時代替將來時，排除A、D；project與approve是動賓關(guān)系，即項目是被通過的，應該使用被動語態(tài)，排除B，故選C。

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