单项选择题

The product was attacked when it was first （） , but gradually it was accepted.

A．advanced
B．occurred
C．appeared
D．challenged

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单项选择题

Their arguments （）most of the students.

A．appeal for
B．appeal to
C．apply for
D．apply to

单项选择题

If（） , his experiment is sure to fail in the end.

A．managed well
B．well managed
C．not well managed
D．well not

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