单项选择题

The word "infertile", in paragraph 2, most probably means （）.

A．separated from each other for long
B．with physical and emotional problems
C．short of time and money
D．unable to give birth to a child

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热门试题

单项选择题Heart attacks can be treated with human cloning technology by （）

A．removing the damaged part of the heart
B．repairing the heart with cells cloned from healthy ones
C．replacing the old heart with a cloned one
D．giving the patients injections of various medicines

单项选择题20（）

A．master
B．present
C．go over
D．get through