14. A: What is the largest country in the world?

      B: _________

       A. Russia is larger than China.                       B. Russia is a large country.

                                           C. I think Russia is the largest.                      D. There are many large countries in the world.

15. What does the sign mean?

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A. This roller coaster is 140cm high.

B. You have to be 140 cm tall to ride on this roller coaster.

C. If you are shorter than 140 cm, you can’t ride on this roller coaster.

D. If you are taller than 140 cm, you can’t ride on this roller coaster.

16. What does the sign mean?

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A. You must keep your seat belt fastened.

B. You can wear your seat belt if you want.

C. It’s not good to fasten your seat belt.

D. You need to bring a seat belt.