They try _____(not,do) that again,but they fail _____ (do) it.
问题描述：
They try _____(not,do) that again,but they fail _____ (do) it.
答
not doing, to do
答
no to do ,to do
答
not doing,to do
他们又一次尝试不要那样做,但他们失败了.