单项选择题

What is one of the problems in the Biramichi River（）

A．Lack of oxygen.
B．Overgrowth of water plants.
C．Low water level.
D．Serious pollution upstream.

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What do we learn from the conversation（）

A．The woman has to attend a summer course to graduate.
B．The man thinks the woman can earn the credits.
C．The woman is begging the man to let her pass the exam.
D．The woman is going to graduate from summer school.

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What did the woman say about her presentation（）

A．It has nothing to do with the Internet.
B．She needs another week to get it ready.
C．It contains some valuable ideas.
D．It’s far from being ready yet.

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What kind of will do most people leave behind ac- cording to the passage（）

A．Oral instructions recorded on a tape.
B．A brief letter sealed in an envelope.
C．A written document of several pages.
D．A short note to their lawyer.