Thedoctorisnowverybusy,manypatientsarewaiting___outsidehisoffice.a,toexamineb,tobeexaminingc,tobeexa
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题目内容：
The doctor is now very busy ,many patients are waiting___ outside his office.a,to examine
b,to be examining
c,to be examined
d,examination
选哪个,为什么?
优质解答
C,是指病人等着被诊断,是被动语气
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