Finish your homework, _______ you can’t watch football games, Sam.–All right, Mum.

The two sides have reached a partial agreement, but several differences still ________ between them.

33．It was the first time that Mike______the piano at the concert hall and he hoped that his nervousness would go

Some scientists think there are _______ 2，000 million flashes oflightning per year.

How old is Steve—He is ____________ and he has an ___________ sister.