According to a U.S. survey, children spent up to twenty hours a week _______ TV.

[　　]

As we all know, we should pay much attention ________ people's living conditions.

[　　]

He was shocked ________ his son playing all days.

[　　]

Hunters can always hear birds whistling ________ the edge of the woods.

[　　]

According to the art dealer, the painting ________ to go for at least a million dollars.

[　　]

Alice is fond of playing ________ piano while Henry is interested in listening to 　　   music.

[　　]

The number of trees that ________ cut down ________ 3000 last year.

[　　]

I'll see to ________ that we are back before 4∶00.

[　　]

While seeing the ________ movie, most of the ________ children cried with great fear.

[　　]

After an earthquake, you should be careful. You might be hit by the ________ buildings.

[　　]