单项选择题


A．difficulties
B．troubles
C．problems
D．to be helped
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单项选择题
A．fatB．fatterC．much fatterD．much more fatter
A．fat
B．fatter
C．much fatter
D．much more fatter
单项选择题
China is______the largest country in population in the world.
A．by far
B．far away
C．a bit
D．farther
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