单项选择题

Criticism and self-criticism is necessary ______ it helps us to find and correct our mistakes.

A．by that
B．at that
C．on that
D．in that
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单项选择题
John Dewey believed that education should be a preparation for life, that a person learns by doing, and that teaching must ______the curiosity and creativity of children.
A．seek
B．stimulate
C．shape
D．secure
单项选择题
All things______, the planned trip will have to be called off.
A．considered
B．be considered
C．considering
D．having considered
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