单项选择题

Meteorologists forecast the weather______.

[A] when they have received satellite pictures
B. during they study satellite pictures
C. after they have compared new satellite pictures with earlier ones

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单项选择题

Which of the following is true7

[A] The two farmers finally found out why they were poor.
B. Neither of the farmers is clever.
C. The two farmers will soon get rich.

单项选择题

The two farmers had to sell their apples at a low price because______.

[A] theirs weren't as good as the others'
B. theirs were much less than the others'
C. a lot of apples had been already carried to the city