The life we were used to ______ greatly since 1980.

A. change B. has changed C. changing D. have changed

B 【解析】句意：自從1980年我們過去的生活發(fā)生了巨大的改變。根據(jù)since 1980.可知是現(xiàn)在完成時態(tài)，主語是The life we were used to不可數(shù)名詞；故選B
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