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     Mr and Mrs Green were going on their vacation with their children, and they had to arrive at the airport

before 11: 40 the next morning. "It takes us thirty minutes to get there in a car," Mr Green said, "so we have

to get ready before eleven o'clock. Don't be late."

     It was ten fifty in the morning. Mr Green and the children were busy doing things. But Mrs Green wasn't.

She sat in a chair in the garden and enjoyed the good weather.

     Mr Green and the children were surprised, but Mrs Green said, "Don't worry! Before I went bed last night,

I made all our clocks and watches twenty minutes ahead (提前). Now we can get to the airport early."

1. Why did the Green family have to be ready before eleven o'clock?

A. They were going to a party.

B. They had to go to the airport by bus.

C. They had to arrive at the airport at 11: 40.

2. How long does it take the family to the airport by car?

A. Twenty minutes.

B. Thirty minutes.

C. Forty minutes.

3. The father and children were _____ when they saw Mrs Green sitting in the garden.

A. sad

B. happy

C. surprised

4. Why did Mrs Green sit in the garden?

A She wanted to stay at home.

B. She didn't like to do anything at home.

C. She made all the clocks and watches ahead and they wouldn't be late.

3. What time was it when Mr Green and the children were busy doing things?

A. 10: 30.

B. 10: 50.

C. 11: 00.