【題目】Today we're going to________the questions of the last maths examination.

A. turn on B. clean up C. focus on D. open up

【答案】C

【解析】

句意今天我們將集中討論上次數(shù)學(xué)考試的問題。turn on 打開,clean up 清掃,focus on聚焦于,集中注意力于…, open up開發(fā),打開根據(jù)句意可知這里表示聚焦于,故選C。

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