1 won’t call you, ________ something unexpected happens.

A. unless    B. whether    C. because    D. while

A.


解析:

unless表示“除非、如果不是”。根據(jù)意思可得。

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David Wilkins

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developing newspaper business

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forming newspaper organizations

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improving newspaper qualities

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keep a close watch on animals

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keep close track of the Earth’s magnetic force in earthquake areas

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keep inventing instruments to pick up every earthquake

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keep a record of earthquake area’s magnetic pull of force

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C
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