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1 It is absurd to predict that the sun will not rise tomorrow.

A ridiculous B funny

C odd D foolish

2 A lot of people could fall ill after drinking contaminated water.

A muddled B polluted

C mixed D troubled

3 The room is dim and quiet.

A tiny B pleasant

C dark D agreeable

4 The index is the government's chief gauge of future economic activity.

A measure B opinion

C evaluation D decision

5 It's prudent to start any exercise program gradually at first.

A workable B sensible

C possible D feasible

参考答案：1. A 2. B 3. C 4. A 5. B