—Whatdoyouthinkofthemathsproblem?—It’sveryeasyandmosto...

问题详情：

 — What do you think of the maths problem?

— It’s very easy and most of us have       .

A. worked it out         B. taken it out              C. picked it out         D. sent it out

【回答】

A

知识点：动词和动词短语

题型：选择题