单项选择题

Small farms and the lack of modern technology have______ agricultural production.

A．blundered
B．tangled
C．bewildered
D．hampered
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单项选择题
People who live in small towns often seem more friendly than those living in ______ populated areas.
A．densely
B．intensely
C．abundantly
D．highly
单项选择题
This great______ joins the two areas which belong to different countries.
A．cane
B．chant
C．cannon
D．canal
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