【題目】The mobile phone has changed people’s life a lot ________ it was invented.

A. until B. since C. before D. after

【答案】B

【解析】

試題分析: 句意：自從手機(jī)被發(fā)明了，它已經(jīng)大大地改變了我們的生活。此題考查since引導(dǎo)的狀語從句，主句用現(xiàn)在完成時(shí)，根據(jù)句意，故選B。

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