The problems are too complex ________ easily.A．to be solvedB．to solveC．solvedD．s_刷题宝

题干

The problems are too complex ________ easily.

A．to be solved

B．to solve

C．solved

D．solving

上一题下一题 0.64难度单项选择更新时间:2016-11-01 05:59:08

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