单项选择题

Enormous sums of money have been spent on space exploration.

A. Much
B. Large
C. Small
D. Fixed
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单项选择题
Have you talked to her lately
A. lastly
B. finally
C. shortly
D. recently
单项选择题
Medicine depends on other fields for basic information, particularly some of their specialized branches.
A. conventionally
B. obviously
C. especially
D. inevitably
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