—Do you have anything to say for yourselves?—Yes, there is one point _________ we must insist on.
______I understand your viewpoint, I don’t agree with it.
Do you know when the Great Wall _________?
He tried his best to solve the problem, _______difficult it was.
This film_________ the scenes of my childhood.
—Do you think playing cards is beneficial to our study? —No,if ________,it can help us kill time when we have nothing to do.