单项选择题

Questions 11 to 18 are based on the conversation you have just heard.

A．One of her friends was absent from the party.
B．All her friends took partners to the party.
C．Not all her friends came to the party.
D．All her friends were present at the party.
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单项选择题
Despite transplant surgeons' work, every year many people die because______.
A．they are unlucky patients
B．organ transplantation is unreliable
C．there are not enough proper organs for transplantation
D．few people are willing to donate their organs after death
单项选择题
The danger of transplanting animal organs into humans is that______.
A．it is considered ethically wrong
B．it may bring diseases into human bodies
C．it brings parasites into human bodies
D．it does more harm than good to humans
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