Good use that the villagers have been ________ the water resources has brought them a large income.
#12747
A
making of
B
putting into
C
taking on
D
providing with
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Many human activities also _______carbon gases, which will result in global warming.
#12277
A
put off
B
send off
C
let off
D
set off
At today’s meeting we are to discuss and decide on the most effective ___________ to the study of mathematics.
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A
approaches
B
means
C
methods
D
ways
This field of scientific research remains________.
#12596
A
to be untouching
B
being touched
C
to be untouched
D
untouched