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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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單項選擇題

She's part of a team of scientists who are（）upon cancer research.

A.worked
B.arranged
C.engaged
D.involved

單項選擇題

The（）doesn't cover household items.

A.intelligence
B.insurance
C.instance
D.insult