单项选择题

The energy gained from the sun can then be used during the night to enable the necessary chemical reactions to ______ in his body.

A．precede
B．proceed
C．progress
D．practice
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单项选择题
Our school singing group is going to give ______ performance next month; don't miss it.
A．an alive
B．a living
C．a live
D．a life
单项选择题
I can't read the marks and notes Jenny made in the margin because they are too ______.
A．faint
B．misty
C．transparent
D．opaque
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