单项选择题

He was busy writing the essay all the morning, only ()occasionally to have a cup of tea.

A. breaking off
B. breaking out
C. breaking
D. breaking away

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单项选择题
However, at times this balance in nature is(), resulting in a number of possibly unforeseen effects.

A. troubled
B. disturbed
C. confused
D. puzzled
单项选择题
He is a hypocrite, a liar, a thief-- (), he is the greatest devil I ever know.

A. as a consequence
B. as a rule
C. as a matter of fact
D. as a matter of routine
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