单项选择题


Questions 23 to 25 are based on the conversation you have just heard.

A．It’s light-weighted and small.
B．It has metal filters.
C．It looks like a straw.
D．It’s large but necessary.
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单项选择题
A．The man looks very nice in a suit and tie.B．The man does not need to change clothes.C．She likes the sweater the man is wearing.D．She does not think jeans are appropriate.
A．The man looks very nice in a suit and tie.
B．The man does not need to change clothes.
C．She likes the sweater the man is wearing.
D．She does not think jeans are appropriate.
填空题
Cloning large mammals and life forms had been practiced for many years by the time of Dolly was cloned.
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