【題目】Many scientists have ________ been to the North Pole. ( )

A. ever

B. already

C. yet

D. still

【答案】B

【解析】

句意:許多科學家……去過北極點。A曾經(jīng),B已經(jīng),用于肯定句,C已經(jīng),還,用于否定句的句尾,D仍然,have been to表示已經(jīng)去過了,是肯定句,故選B.

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