【題目】Britain __to leave European Union last year. David Cameron, former Prime Minister __since then.

A. decided, retired B. decided, has been retired

C. has decided, retired D. has decided, has retired

【答案】B

【解析】句意：英國去年決定退出歐盟。英國前首相戴維卡梅倫( David Cameron )從此退休�？疾閯釉~時態(tài)辨析題。last year去年，用于一般過去時，可排除CD兩項。since then從那時起，用于現(xiàn)在完成時，可排除A項。根據(jù)句意語境，可知選B。

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