Listen, a small number of students ______ in the classroom.
A．talk B．talks C．is talking D．a(chǎn)re talking
D

試題分析：根據(jù)a small number of students“少量學(xué)生”作主語可知，其后的謂語動詞應(yīng)該用復(fù)數(shù)形式，故應(yīng)該排除BC；又根據(jù)listen可知，本句的時態(tài)應(yīng)該是現(xiàn)在進(jìn)行時。所以本題選D。
點(diǎn)評：本題有兩個關(guān)鍵點(diǎn)：一是時態(tài)，要注意動作發(fā)生的時間，盡量找出句中表示時間的詞或短語；二是注意區(qū)分a number of和the number of的區(qū)別：a number of是“許多的”，作主語時謂語動詞要用復(fù)數(shù)；而the number of是“……的數(shù)量”，作主語時，謂語動詞要用單數(shù)。
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