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單項選擇題

Is that seat taken?（）

A.Please don't worry.
B.I don't think so.
C.Why not?
D.It's very nice.

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單項選擇題

Is Mary there?（）

A.Speaking.
B.I'm not Mary.
C.Who are you?
D.Mary is well today

單項選擇題

Is Linda good at singing? Yes, she is. We often hear her（）in her room.

A.to sing
B.sang
C.sing
D.sings