单项选择题
Would you mind（）down and wait for a few more minutes？
A.sittingB.to sitC.to have satD.sit
单项选择题 液氯与反应器间设置（）和缓冲罐。
单项选择题 At first（）I thought it was Mary，but when I looked again I saw it was Jane.
单项选择题 They were evidently trying to（）the public into obedience.
