________ (fail) several times, they need some encouragement.
Having failed
暂无解析
I wonder if he could get it ________ (do) before tomorrow.
Iwishyou________likethat.
A beam of light will not bend round corners unless ________ (make) to do so with the help of a reflecting device
Only when you have obtained sufficient data ________ come to a sound conclusion.
Tosucceedinascientificresearchproject________.