单项选择题

In other words, all mammals, ______ their size, breathe once every four heartbeats.

A. regardless
B. however
C. whatever
D. according
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单项选择题
Many people prefer to have their tax forms completed by a professional rather than ______ it themselves.
A. doing
B. do
C. to do
D. did
单项选择题
______ he lived most of his adult life in France, James Joyce’s fiction was always set in Ireland.
A. Because
B. Despite
C. Since
D. Although
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