單項選擇題— Nice weather, isn't it? ---（）

A.I’m not sure
B.You know it well 
C.Yes, it is
D.Yes, it isn’t


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1.單項選擇題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

2.單項選擇題The medicine （） cool, clean and dry.

A.must   keep
B.must   be   kept
C.must   be   keep
D.must   be   in

3.單項選擇題“Must we start the experiment now?” “No, you （）.”

A.won’t
B.needn’t
C.can’t
D.may  not

4.單項選擇題He keeps（）at himself in the mirror.

A.to look 
B.looking
C.look 
D.looked

5.單項選擇題Don't disturb me. I（）letters all morning and have written ten so far.

A.write
B.have written
C.was writing 
D.have been writing