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【多选题】
电厂常用抽气设备有下列哪几种类型（）。A.
射汽抽 气 器
B.
射水抽 气 器
C.
水环式真空泵
D.
活塞式真空泵
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皮皮学刷刷变学霸
举一反三
【单选题】— I called you yesterday evening. But nobody was in. — Sorry, I _____ with parents in the park. [ ]
A.
take
B.
took a walk
C.
was taking a walk
D.
are taking a walk
【单选题】– I called you yesterday evening, but there was no answer. --Oh, I am sorry. I __________ dinner in my friend’s home.
A.
have
B.
had
C.
was having
D.
have had
【单选题】When you phoned me yesterday evening, I _______ the housework and was starting to take a bath.
A.
had just finished
B.
was finishing
C.
have already finished
D.
was going to finish
【简答题】嗯,还是那样呗。
【单选题】---I called you yesterday evening, but there was no answer. ----- Oh, I’m sorry. I _____ dinner at a restaurant at that time.
A.
have
B.
had
C.
was having
D.
have had
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