题目

Tina and I are good friends. Our ______ began 10 years ago.A. message B. friendship C. suggestion D. education 答案：【答案】B【解析】句意“蒂姆和我是好朋友，我们的友谊十年前就开始了”。A.信息；B.友谊；C.建议；D.教育。根据句意，故选B。解方程：x-12+1=-(1-x)．