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【单选题】
下列关于发生器（如图）的说法，错误的是 [ ]A.
发生器是块状固体与液体试剂在常温条件下起反应制取气体的典型装置
B.
实验开始从装置中a处加液体药品，再从b处加固体药品，实验结束后从c处倒废液
C.
使用前，检查装置的气密性
D.
发生器有随开随用，随关随停的优点
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【单选题】—It is said that we will have another examination next week. —Really? ________, we must begin to prepare right now.
A.
If so
B.
If possible
C.
Great
D.
Unfortunately
【单选题】—lt is said that we will have another examination next week. —Really? __________,we must begin to prepare right now. [ ]
A.
If so
B.
If possible
C.
If not
D.
Otherwise
【单选题】—Excuse me Could you wake me up when my friend____ here? —Of course. But we still don't know when your friend _____ here.
A.
comes; will come
B.
comes； comes
C.
will come; comes
D.
will come； will come
【单选题】Excuse me,could you please tell me my car?
A.
why to stop
B.
where to park
C.
where can I park
D.
how can I park
【单选题】-Excuse me.Could you tell me ? -Certainly.
A.
when can i get to the stattion
B.
I can get to which station
C.
which station can i get to
D.
how I can get to the station
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