______ difficult for us ________ the horse to the tree.A．We're; to tieB．We're; t_刷题宝

题干

______ difficult for us ________ the horse to the tree.

A．We're; to tie

B．We're; tying

C．It's; to tie

D．It's; tying

上一题下一题 0.65难度单选题更新时间:2018-06-08 10:33:57

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