[ Grammar ]
Better methods of refrigeration depend ______ engineers.
A. on
B. in
C. to
D. at
Select your answer:
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Grammar › ViewI …………………………………. in here for over 11 years fo far.
A. have been studied
B. studied
C. have studied
D. has studied
General Knowledge › View
How many legs do butterflies have?
A. 12
B. 9
C. 1
D. 0
E. 6
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