单选题
With his brows knitted, the doctor
contemplated
the difficult operation he had to perform.
A、
succeeded in
B、
decided against
C、
went on with
D、
thought deeply about
【正确答案】
D
【答案解析】
succeeded in在……方面成功；decided against不赞成做某事；went on with伴随； thought deeply about深思。
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