皮皮学，免费搜题
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【单选题】
（）是扑救、控制建筑物初期火灾的最为有效的灭火设施，是应用最为广泛、用量最大的水灭火系统。A.
消火栓系统
B.
自动喷水灭火系统
C.
气体灭火系统
D.
干粉灭火系统
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【单选题】——________ Mary happy today? ——I don’t think so. She ________ look happy this morning.
A.
Is, isn’t
B.
Is, doesn’t
C.
Does, doesn’t
D.
Does, isn’t
【单选题】— ________ the girls happy? — No, ________. [ ]
A.
Are; they aren't
B.
Are; they are
C.
Are; there aren't
D.
Are; there are
【简答题】that he wasn't happy with the arrangements, I tried to book a different hotel. A) Puzzling B) Penetrating C) Perceiving D) Preserving
【单选题】—Happy Halloween! —_______ [ ]
A.
Happy New Year!
B.
The same to you!
C.
Thank you!
D.
Don't say that.
【简答题】He was so happy to go home that he couldn’t sleep on the train． He was ______ happy to sleep on the train because he was going home．
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