单项选择题
______ of years ago, whales lived ______ land and walked on four legs.
A．Millions... on
B．Million... in
C．Millions... on the
D．Million... on
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单项选择题
Though he had often made his little sister ______, today he was made ______ by his little sister.
A．cry, to cry
B．crying, crying
C．cry, cry
D．to cry, cry
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单项选择题
It was ______ last week ______ I knew the news.
A．until... that
B．not until... when
C．not until... that
D．until... since
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