单项选择题

Dolly will live longer than an ordinary lamb.

A．Right
B．Wrong
C．Doesn't say
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单项选择题
A．Let usB．Let'sC．Let
A．Let us
B．Let's
C．Let
单项选择题
Countless sheep can be cloned from one fetal cell.
A．Right
B．Wrong
C．Doesn't say
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