单项选择题

The word "infertile" (Line 1, Para. 2) most probably means "（） ".

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

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单项选择题

Heart attacks can be treated with human cloning technology by （）.

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

单项选择题

According to the passage, one of the first expected benefits from cloning technology may be in.（）

A．the treatment of heart attacks
B．the bearing of babies
C．the cure of blood diseases
D．the detection of gene-related diseases