A hybrid power-pack is a combination of different types of batteries.
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The application forms must include______.
A. the decision procedure
B. the college achievements
C. the best technique
D. a list of advice and judgments
I couldn't understand why he pretended______in the garden.
A. not to see me
B. not see me
C. to see me not
D. to see not me
A necessary cause is ______.
A. one without which it is impossible for the effect to occur
B. one of the causes that can produce the effect
C. one that is enough to make the effect occur
D. None of them.
Members of the tribes got others to do something by ______.
A. telling them what to do
B. showing them how to do it
C. showing them examples
D. persuading them to do it
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