单项选择题

A．problems
B．issues
C．duties
D．jobs
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单项选择题
A．A full-sized cello.B．A half-sized cello.C．A two-thirds-sized cello.D．It is not mentioned.
A．A full-sized cello.
B．A half-sized cello.
C．A two-thirds-sized cello.
D．It is not mentioned.
单项选择题
A．led upB．ledC．resultedD．caused
A．led up
B．led
C．resulted
D．caused
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