Studies ________ that children who often take part in cooperative programs benefit a lot more than other children,

The difference between an accident and a serious incident ____ the result.

You will be able to make it to the tennis court; you＇ll get there ____.

I could tell he was surprised from the ____ on his face.

Every seat in the passenger cabin of an aircraft ____ a seat belt.

Next week a flight plan ____ for a new route.

This work needs experience ____ care.

His behavior is ____ great praise.

I ____ like to test this instrument.

The modern jet ailiners are very big and can carry ____ 200 passengers.

Last year, a lot of air ____ took place in America.