单项选择题

Passage One Questions 26 to 28 are based on the passage you have just heard.

A．Some of its operating system may break down for some reason.
B．Some of its operating system cannot support high-quality DVD playing.
C．Its market share is shrinking.
D．DVD playing may affect other operating system.
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单项选择题
A．Drug abuse can cause a lot of adverse physical reactions.B．Drug abuse can cause malnutrition.C．Drug abuse may damage the heart, liver and brain.D．Drug abuse can cause cancer.
A．Drug abuse can cause a lot of adverse physical reactions.
B．Drug abuse can cause malnutrition.
C．Drug abuse may damage the heart, liver and brain.
D．Drug abuse can cause cancer.
单项选择题
A．Because he has enough money to buy stamps.B．Because he used to receive stamps as gifts.C．Because stamp collecting is his hobby.D．Because he invests in stamps.
A．Because he has enough money to buy stamps.
B．Because he used to receive stamps as gifts.
C．Because stamp collecting is his hobby.
D．Because he invests in stamps.
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