Is this the first time that you _____ here?
A．visitB．a(chǎn)re visitingC．had visitedD．have visited
D
考察時態(tài)。句意：這是你第一次到這兒嗎？可知從句描述的是現(xiàn)在已完成的動作，故用現(xiàn)在完成時態(tài)，選D。
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