Dogs, if treated properly and trained with firm kindness, are faithful and ___.
A. conditional
B. dependent
C. reliant
D. reliable
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She is always seeking to improve the ___ and effectiveness of teaching.
A. sufficiency
B. deficiency
C. efficiency
D. facility
Did scientists ___ the revolution in communication technology?
A. conserve
B. reserve
C. renovate
D. foresee
The mortality ___ of cancer has been going down in recent years.
A. rate
B. budget
C. concern
D. vision
___ is that last year’s crop wasn’t good.
A. The reason that food prices are rising
B. The reason which food prices are rising
C. The reason why food prices are rising
D. The reason how food prices are rising
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