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-Have you known him for a long time?  
-Yes, since he ________ here after graduation.
A．comesB．cameC．has come D．had come
B
這題考查時(shí)態(tài),since引導(dǎo)的時(shí)間狀語從句用過去時(shí)，表示自從過去某個(gè)時(shí)間，主句用現(xiàn)在完成時(shí)，句意是：--你認(rèn)得他很長時(shí)間了嗎？--是自從他畢業(yè)后來到這兒。選B。
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