单项选择题

It is now generally assumed that the planets were formed by the accretion of gas and dust in a cosmic cloud.

A．separation
B．reaction
C．accumulation
D．motion
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单项选择题
I admire his work.
A．recognize
B．exploit
C．tolerate
D．esteem
单项选择题
If the weatherman has predicted accurately, tomorrow will be a perfect day for our picnic.
A．astutely
B．correctly
C．carefully
D．acutely
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