单项选择题

What is the woman doing now

A．She is cooking.
B．She is reading a book.
C．She’s writing a letter.
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单项选择题
A．The red one.B．The black one.C．The green on
A．The red one.
B．The black one.
C．The green on
单项选择题
Dr. Marcy thinks that life may exist in the 55 Cancri system because ______.
A．he has found the system similar to the solar system
B．he has discovered an Earth-like planet there
C．he has discovered a rocky planet there
D．he has found signs of life in the system
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