—I have a headache.
—I’m not surprised you ________ in front of the computer for too long.
A．workB．a(chǎn)re workingC．have been workingD．had worked
C

試題分析：句意：--我頭疼。--我一點(diǎn)都不奇怪，你在電腦前面太長(zhǎng)時(shí)間了。因?yàn)楹蚮or too long連用，用現(xiàn)在完成進(jìn)行時(shí)，表示動(dòng)作從過(guò)去到現(xiàn)在一直在做，對(duì)現(xiàn)在造成影響，而且可能還要繼續(xù)下去，選C。
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