【題目】We are not ready to go into production yet, for the new switch mechanism isn’t fully ______.

A.tried out B.tested out

C.worked out D.turned out

【答案】B

【解析】

試題分析:考查動詞短語辨析。A.tried out 嘗試B.tested out測試C.worked out 計算D.turned out證明;句意:這種新車還沒有投入生產(chǎn),它的發(fā)動機還沒有完全通過監(jiān)測。根據(jù)句意說明B項正確

考點 : 考查動詞短語辨析

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