单项选择题

With the development in science and technology man can make various flowers ______ before their time.

A．be bloomed
B．bloom
C．bloomed
D．blooming
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单项选择题
Scientific research results can now be quickly_______to factory production.
A．used
B．applied
C．tried
D．practiced
单项选择题
While he was in Beijing, he spent all his time_______some important museums and buildings.
A．visiting
B．travelling
C．watching
D．touring
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