单项选择题
A.I’m not sure B.You know it well C.Yes, it is D.Yes, it isn’t
When we were having a meeting, the director（）the bad ne...
单项选择题When we were having a meeting, the director（）the bad news by telephone.
A.was telling B.was told C.could tell D.would tell
The medicine （） cool, clean and dry.A.must keepB....
单项选择题The medicine （） cool, clean and dry.
A.must keep B.must be kept C.must be keep D.must be in
“Must we start the experiment now?” “No, you （）.”A.won...
单项选择题“Must we start the experiment now?” “No, you （）.”
A.won’t B.needn’t C.can’t D.may not
