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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

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

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

單項選擇題

In some parks visitors are requested to keep（）the grass.

A.aside
B.away
C.out
D.off