单项选择题

A．analysis
B．research
C．undertaking
D．effort
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单项选择题
A．thatB．whoseC．thoseD．all
A．that
B．whose
C．those
D．all
单项选择题
A．includeB．includedC．includingD．inclusive
A．include
B．included
C．including
D．inclusive
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