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單項選擇題

— Who is that speaking? — This is Tom（）

A.speaks
B.spoke
C.speaking
D.saying

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單項選擇題

Stocks are regarded as a good long-term（）

A.involvement
B.installment
C.investment
D.instrument

單項選擇題

This fire extinguisher is to be used only in case of（）

A.urgency
B.crisis
C.immediacy
D.emergency

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