Scientistsareconvincedtheposit

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更新 2022-09-03
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Scientists are convinced ______ the positive effect of laughter ______ physical and mental health.

A．of; at

B．by; in

C．of; on

D．on; at

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.An air France jet is reported________in the Atlantic Ocean with 228 people aboard，the airline’s worst disaster in its 75-year history．

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A wonderful idea suddenly occurred to me _______ I would turn to the reference book to finish my homework

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