单项选择题

Passage Two
Questions 29 to 31 are based on the passage you have just heard.

A) In 1930s. C) In 1970s.
B) In 1940s. D) In 1980s.
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单项选择题
A) Sightseeing. C) Taking photographs. B) Enjoying sunshine. D) Diving.
A) Sightseeing. C) Taking photographs.
B) Enjoying sunshine. D) Diving.
单项选择题
A．Because the shape of snow crystal(晶体) is still a mystery for experts.B．Because the snowfall is a blessing for human beings.C．Because experts have different ideas about the formation of snowflakes.D．Because it is not easy to judge the time or place of snowfall.
A．Because the shape of snow crystal(晶体) is still a mystery for experts.
B．Because the snowfall is a blessing for human beings.
C．Because experts have different ideas about the formation of snowflakes.
D．Because it is not easy to judge the time or place of snowfall.
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