单项选择题

A．The TV program.
B．The man’s headache.
C．The appearance of Elizabeth.
D．The mid-term examination.
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单项选择题
A．Dr. Collin.B．A new type of fuel.C．Spray cans.D．A test.
A．Dr. Collin.
B．A new type of fuel.
C．Spray cans.
D．A test.
单项选择题
The crucial function of photosynthesis in terms of plant needs is______.
A．to form sugars
B．to combine carbon dioxide with water
C．to preserve water
D．to derive energy from light
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