Compared with monogamy, polygamy is practiced ______.
A. by less people
B. mostly by young people
C. more commonly
D. by people who have many sisters or brothers
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【32】
A. being called
B. calling
C. called
D. having called
According to the passage, the author considers the reduction of energy in an empty region
A. a well-known process
B. a frequent occurrence
C. a fleeting existence
D. an unexpected outcome
【40】
A. at worst
B. at least
C. at last
D. at most
Why are the city's museums economically important？
A. They have hotels and stores.
B. Tourists are brought to the city by them to spend money.
C. Hotels are beside the museums.
D. They need money to build the museums.
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