单项选择题

We got to work and succeeded, after a good deal of ______, in making our butter.

A. trial and error
B. morning and night
C. bitterness and hard
D. failure and success
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单项选择题
They believed that this was not the ______ of their campaign for equality but merely the beginning.
A. climax
B. summit
C. pitch
D. maximum
单项选择题
______ enough time and money, the scientists would have been able to discover more in this field.
A. Giving
B. To give
C. Given
D. Being given
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