单项选择题

The teacher spoke so fast that it was hard for the students to ______ what he was saying.

A．take in
B．take out
C．take up
D．take over
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单项选择题
The shortage of energy is getting worse. It ______ an immediate solution.
A．calls off
B．calls up
C．calls for
D．calls at
单项选择题
With the flowers ______ everywhere, the park looks beautiful.
A．to bloom
B．blooming
C．be blooming
D．to be blooming
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