单项选择题

The ability to zoom ______ is particularly useful when you are working on detailed diagrams.

A. out
B. in
C. on
D. up
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单项选择题
The class went to see the performance of Macbeth because it ______ in well with the project they were doing on Scottish history.
A. booked
B. crammed
C. stood
D. tied
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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