Mr.Smith as well as two of his students ________ the experiment with care at the moment.

A．is doing B．a(chǎn)re doing C．does D．do

 

A

【解析】句意：史密斯先生和他的兩個學生此刻正在認真地做實驗。as well as“和；也”，此處連接兩個并列主語，謂語動詞的數(shù)應與前面的主語Mr.Smith 保持一致。根據(jù)時間狀語at the moment可知應用現(xiàn)在進行時，故A項正確。

 

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