Those _________  may leave the classroom now.

A．whohasfinishedB．whohavefinished
C．havefinishedD．whomhavefinished

B

解析試題分析：句意：已經(jīng)完成的那些人現(xiàn)在可以離開(kāi)教室了。這里是定語(yǔ)從句，先行詞是those，who在從句中作主語(yǔ)，不能省去，因?yàn)樗傅氖菑?fù)數(shù)，故選B。
考點(diǎn)：考查定語(yǔ)從句的用法。
點(diǎn)評(píng)：本題難度適中。定語(yǔ)從句是高中階段的重難點(diǎn)之一，需要考生有分析理解復(fù)雜的句子結(jié)構(gòu)的能力，能夠正確理解句子的語(yǔ)境，熟練掌握關(guān)系詞的意義及句法功能。注意who作主語(yǔ)看先行詞的單復(fù)數(shù)，來(lái)確定從句謂語(yǔ)的單復(fù)數(shù)。
即學(xué)即練：A large number of students give messages to their close friends through this radio club, ________ hosts are all their schoolmates.
A. that       B. of which      C. which      D. whose
解析：D。whose 在從句中作定語(yǔ)，修飾hosts.

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