单项选择题

An investigation that is unguided can occasionally yield new facts, even notable ones, and the typical appearance of such facts is the result of a search in a definite direction.

A. but the typical appearance of such facts
B. but typically the appearance of such facts
C. and typically the appearance of facts as such
D. and the typical appearance of facts as such
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单项选择题
Only when total production expands faster than the rate of labor force growth plus the rate of productivity increase and minus the rate with average annual hours fall so does the unemployment rate.
A. at which average annual hours fall does the umemployment rate fall.
B. which average annual hours fall so does the umemployment rate.
C. in which average annual hours fall and so does the umemployment.
D. which average annual hours fall does the umemployment rate fall.
单项选择题
The paradoxical aspect of the myths about Demeter, when we consider the predominant image of her as a tranquil and serene goddess, is her agitated search for her daughter.
A. when considering the predominant image of her as
B. when consider the predominant image of her as
C. while considering the predominant image of her like
D. if we consider the predominant image of her like
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