单项选择题

What is the best way to care for babies

A．Keep them in family-based day care centers.
B．Let them stay with their parents or teachers.
C．Ask elderly adults to attend them.
D．Hire an experienced baby-siner.
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单项选择题
Venus is the hottest of all the nine planets in the solar system because______.
A．it is not so close to the Sun as Mercury
B．many volcanoes spread the whole planet
C．it is covered by a thick layer of cloud
D．greenhouse effect is uncontrollable on it
单项选择题
A．He has edited three books.B．He has bought the wrong book.C．He has lost half of his money.D．He has found the chemistry book.
A．He has edited three books.
B．He has bought the wrong book.
C．He has lost half of his money.
D．He has found the chemistry book.
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