—What do you think of your nephew? —He__________ be very naughty but at the same time you poor.
It is high time, I think, that you got down to ______ something in class.
I've never seen a Shakespeare's play ______ so wonderfully.
Tom's shoes looked just the same as Mike's, but they cost _______ his.
Mother, together with her children , ______ to the hospital.
The war made ______ impossible for the scientist to go on with his research.