The teacher is already standing here. Do you know when she ______?
A．comesB．came
C．is comingD．was coming
B

試題分析：句意:老師已經(jīng)站在這兒了。你知道她是什么時(shí)候來(lái)的嗎？come來(lái)，是一個(gè)動(dòng)詞。根據(jù)句意可知，老師現(xiàn)在已經(jīng)站在這里了，因此來(lái)這個(gè)動(dòng)作應(yīng)該是過(guò)去發(fā)生的，應(yīng)該用一般過(guò)去時(shí)，故選B。A是一般現(xiàn)在時(shí)，表示經(jīng)常性或習(xí)慣性的動(dòng)作；C是現(xiàn)在進(jìn)行時(shí)，表示此刻正在發(fā)生的事情；D是過(guò)去進(jìn)行時(shí)，表示過(guò)去某時(shí)正在發(fā)生的動(dòng)作。
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