It is useful book.—Yes, it tells us how to play football.

There is ______ much traffic on the road. Don’t be in ______ a hurry.

Some little boys have difficulty ______their hearts into the lesson for a long time.

I wonder if you can finish it on your own.—You are wrong. I did it last night _______. [ ]

Why are there a lot of dead fish in the river?－Because they were ______ by the polluted water.