单项选择题

Why didn’t man find a trace of water in moon rocks

A. Because there is no water in the moon.
B. Because the moon is a big sand trap.
C. Because the rocks that were brought to the earth is dry.
D. Because volatile elements in water have burned away.
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单项选择题
Which of the following statements about the crash is TRUE
A. The number.of casualties was 153 on Wednesday.
B. There accident killed 172 passengers on board.
C. The crash took place when the plane was landing.
D. The crash was caused probably by the engine fire.
单项选择题
Samantha Heller suggests that to get benefits from chocolate, you may
A. take nutrients out of chocolate.
B. make cocoa powder on your own.
C. make hot chocolate by yourself.
D. consult an expert on chocolate,
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