The doctor has worked with patients of this kind for eight years, so he knows what in his job.
A. expected
B. to be expecting
C. expects
D. to expect
网友回答
A. expected
B. to be expecting
C. expects
(答案→)D. to expect
解析：本题考查非谓语动词。what to expect 期待什么，expect期待是主语doctor发出的动作，所以不定式要用主动。句意：这名医生跟各种各样的病人打交道九年了，所以他知道工作中会出现什么。