单项选择题

The teacher told us nothing ______ difficult if we put our hearts into it.

A. is
B. was
C. will be
D. were
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单项选择题
If you find this item too difficult to it is advisable to leave as it is and move on to the next one.
A. work out
B. work on
C. work for
D. work at
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. extremely
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