Question

【题目】We have learned ________ three hundred new words this term.

A.at onceB.at allC.at timesD.at least

Answer 1

【答案】D

【解析】

句意：这学期我们至少学了300个新单词。

考查介词短语。at once立刻；at all根本不；at times总是；at least至少；根据“We have learned ________ three hundred new words this term”这学期我们 学了300个新单词，所以此处缺至少，故选D。