— Where is Mr. Wang?
— He is not here. He must _______ the students’ papers in the office.
A．correctB．have correctedC．be correcting D．corrects
C

試題分析：考查時態(tài)。句意：—王先生在哪里？—他不在這里。他一定是在辦公室里批改學(xué)生的試卷。根據(jù)句意是指現(xiàn)在正在發(fā)生的事情，故使用must be doing對現(xiàn)在的情況進(jìn)行推測。故C正確。
點評：時態(tài)題的考查關(guān)鍵是抓住句子的上下文含義和句中的時間狀語。要根據(jù)時間狀語來選擇合適的時態(tài)，在平時的學(xué)習(xí)中要注意積累有關(guān)時態(tài)的用法和各種時態(tài)的特殊之處。
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