The windows are broken and need to be repaired.— I think so. They can hardly _____ the cold now.

I agree with most of what you said. But I don’t agree with___________.

What’re you going to do to protect the environment? — Plant trees on side of the river.

Listen ! Helen is singing in the next room.—It __________ be Helen. She is in Tianjin now.

His business failure left him at the edge of desperation, but, , he managed to go out of the shadow through years of efforts.