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(gè)學(xué)生此刻正在認(rèn)真地做實(shí)驗(yàn)。as well as“和；也”，此處連接兩個(gè)并列主語，謂語動詞的數(shù)應(yīng)與前面的主語Mr.Smith 保持一致。根據(jù)時(shí)間狀語at the moment可知應(yīng)用現(xiàn)在進(jìn)行時(shí)，故A項(xiàng)正確。

 

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