单项选择题

Whenever work is being done, energy ______ from one form into another.

A. converts

B. converted
C. is converted

D. is being converted
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单项选择题
The child is ______ all the evidence for his opinion.
A. not encouraged either to be critical or to examine
B. encouraged either to be critical nor to examine
C. either encouraged to be critical or to examine
D. neither encouraged to be critical nor to examine
单项选择题
To be sure, there would be scarcely no time left over for other things if school children ______ all sides of every matter on which they hold opinions.
A. would have been expected to have considered
B. were expected to consider
C. will be expected to have been considered
D. were expected to have considered
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