The problem of air pollution is becoming more serious ______ the increasing number of cars.

Jane, don't leave things about. You should learn to put everything ____.

John is fond ____ football, while his brother is crazy ____ music.

We do this _____,with spelling games and other activities.

—        busy homework ,the children also have to take arts, music and sports classes in their free time.
— I wonder what they will become.

For miles around me there was nothing but a desert, without a single plant or tree ______.

John likes baseball, and I like it too. Besides, we have a lot in_____ in other respects.

Russia lies______ the north of China.

More high-rise buildings are being built now even in some small cities      
space.

Your father likes to play golf. He’s really enthusiastic ________ it.