单选题
The phrase "build on "in the last parapraph most probably means " ______ ".
A、
rely on
B、
give up
C、
conduct an investigation into
D、
pay great attention to
【正确答案】
A
【答案解析】
[解析] build on“依赖，依靠”。give up“放弃”； conduct an investigation into展开调查；pay great attention to“给予密切关注”，均不妥。
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