Jumping out of ________ airplane at ten thousand feet is quite ________ exciting experience．

/; the

/; an

an; an

the; the

________ she was invited to the ball made her very happy．

What

That

When

Because

________ is said that paper was invented in China．

As

Which

It

That

Smoking is the main ________ of lung cancer．

reason

effect

cause

influence

It won't make much ________ whether you agree or not．

difference

troubles

effect

trouble

Be careful when you cross this very busy street．If not, you may ________ run over by a car．

have

get

become

turn

－I enjoyed the food very much．

－I'm glad you like it．Please drop in any time you like．

Is it all right?

I'm afraid I won't be late．

Yes, I will．

That's great．

－You've left the light on．

－Oh, so I have ________ and turn it off．

I'll go

I've gone

I go

I'm going

It is bad ________ to talk with your mouth full of ________．

manners; foods

manner; food

manner; foods

manners; food

It is generally believed that teaching is ________ it is a science．

as art much as

much an art as

as an art much as

as much an art as