【題目】This is one of the experiments __________ in our laboratory.

A. being made

B. making

C. to make

D. having made

【答案】A

【解析】句意：這是一個正在我們實驗室做的實驗。make與experiments為動賓關(guān)系，故用過去分詞的進行時表被動且表進行。

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