---I have got a headache．
----No wonder ．You _______in front of that computer too long ．
A．work B．a(chǎn)re working C．have been working D．worked
C
考察時態(tài)。句意：我頭疼�！蛔銥槠妗Ｄ阍陔娔X前工作的太久了�？芍獢⑹龅氖且呀�(jīng)完成的一直在進(jìn)行的動作，故用完成進(jìn)行時，選C。
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