Mary wants to study medicine but she is not very clever. I don't think she is _____ it.
A、
up to
B、
for
C、
within
D、
towards
【正确答案】
A
【答案解析】
解析：考查词组辨析。be up to意为“胜任”，故选项A符合题意，为正确答案。be for意为“支持”，不符合题意；within和towards用法不对。
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