单项选择 较难0.4 引用1 组卷29
He has two sons,____work as chemists.
A.two of whom | B.both of whom |
C.both of which | D.all of whom |
18-19高三·全国·中职高考
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______ is known to all is that the old scientist, for ______ life was hard in the past, still works very hard in his eighties.
A.As; whom | B.What; whom | C.It; whom | D.As; whose |
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