单项选择题

Why was it necessary to replace the old standard weight

A．Someone spilled water on it.
B．Someone lost it.
C．It was made of low-quality metal.
D．The standard for measuring had changed.
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单项选择题
Why does the man sometimes get angry with Ted
A．Because he plays the radio too loud.
B．Because he throws his things around.
C．Because he often leaves the door open.
D．Because he comes home late.
单项选择题
A．how toB．howC．what toD．what
A．how to
B．how
C．what to
D．what
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