【題目】People are often at a loss when frequently seeing smog level predictions ________ each other in different official forecasts.

A. contradict B. acknowledge

C. allocate D. circulate

【答案】A

【解析】考查動詞。A. contradict反駁，與…矛盾；B. acknowledge承認(rèn)；C. allocate分配；D. circulate循環(huán)。句意：當(dāng)頻繁地看到霧霾水平預(yù)測上不同的官方預(yù)報互相矛盾時，人們經(jīng)常不知所措。故選A。

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