It is _________ for us to do some exercise every day.
A. benefit
B. benefited
C. beneficial
D. benefiting
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As demand for ________foods has grown, many farmers would not use pesticide any more.
A. chemical-free
B. pesticide-free
C. antioxidant
D. duty-free
We can ______ a lot ________ doing exercises every day.
A. benefit... with
B. benefit...on
C. benefit...from
D. benefit...into
There are many __________in organic foods.
A. benefit
B. beneficial
C. benefiting
D. benefits
Conditions_____ farm to farm, so the experiment results are not reliable.
A. vary from
B. change
C. differ
D. varies from