单项选择题

These old men need some help, ______

A．needn't they
B．don't they
C．need they
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The iron ball is too heavy for me ______.
A．to rise
B．to rise it
C．to raise
单项选择题
Linda plays ______ tennis. She also plays ______ piano.
A．the.../
B．/...the
C．the...the
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