The boy said ________ couldn't he work out the problem but his teacher didn't know how to do it.
The guards caught the spy and _____ him very carefully.
I have no doubt _____ he will get the first place in the competition.
He’s given me so much help that I really want to do something for him _____.
The heavy rain has lasted for several days and the river has______ by 30 centimeters.
It seems that the young man and the lady have little __________.