题干

—Obviously, the boss looks happy again, doesn’t he?
—Yes. It’s said that he has ______ the difficult problem.
A.succeeded in solveB.tried to solve
C.managed to solveD.been solved
上一题 下一题 0.64难度 单项选择 更新时间:2015-08-09 10:41:40

答案(点此获取答案解析)