Mary has two brothers, are doctors. A. both of theyB. both of whomC. both of themD. whom

发布时间：2020-08-16 07:28:55

Mary has two brothers,      are doctors.
A. both of they
B. both of whom
C. both of them
D. whom of both

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A. both of they
(答案→)B. both of whom
C. both of them
D. whom of both
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