单选题
16.
The course normally attracts 20 students per year, ______ up to half will be from overseas.
A、
in which
B、
for whom
C、
with which
D、
of whom
【正确答案】
D
【答案解析】
of(whom)在此表示范围，把后面的非限制性定语从句变成单句即为：up to half of them will be from overseas.
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