单项选择题
We’d better （）economic speed （）fuel consumption.
A.take；save B.to take；save C.take；to save D.to take；to save
单项选择题 This machine （）out of order very often, but now it works well.
单项选择题 When we arrived here yesterday, their ship （）for three days.
单项选择题 The accident resulted （） the motorman’s carelessness.
