单项选择题

Her face brightened up when she saw her long-awaited friend _______.

A．turning off
B．turning away
C．turning in
D．turning up
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单项选择题
We must take _______ measures to protect the natural environment, otherwise, one million species that are alive today will have become extinct.
A．sharp
B．drastic
C．dramatic
D．sturdy
单项选择题
He hadn't _______ quite what was wrong with .his mother. He knew, though, that she hadn't been well for some time now.
A．worked off
B．worked on
C．worked out
D．worked at
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