题目内容
(请给出正确答案)
[主观题]
who had been (6) to work out a very difficult problem in physicsA.managingB.tryingC.thinki
who had been (6) to work out a very difficult problem in physics
A.managing
B.trying
C.thinking
D.hoping
如搜索结果不匹配,请 联系老师 获取答案