17.
A. They were disliked most by children.
B. They were considered most nutritious.
C. They were least used in Belgian cooking.
D. They were essential to children’s health.
18.
A. Vegetables differ in their nutritional value.
B. Children’s eating habits can be changed.
C. Parents watch closely what children eat.
D. Children’s choices of food vary greatly.
Questions 19 to 21 are based on the passage you have just heard.19.
A. Space exploration has serious consequences.
B. India has many space exploration programs.
C. There is quite a lot to learn about the moon.
D. A lot of garbage has been left on the moon.
20.
A. It is costly to bring back.
B. It is risky to destroy.
C. It is of no use on Earth.
D. It is damaged by radiation.
21.
A. Record details of space exploration.
B. Monitor the change of lunar weather.
C. Study the effect of radiation and vacuum on its materials.
D. Explore the possibility of human settlement on the moon.
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