——____ he start at once or wait for a while?——Let him start at once.
Personally I think the ______ Andrew drew from his simple experiment is not scientific.
It is one of the funniest things____ on the Internet so far this year.
They were surprised that a child should work out the problem____ they themselves could not.
We missed the beginning of the football match. When we got to the stadium, the match ______.
The boy was very sick, but he managed to ______.