单项选择题

A．There was no garbage left to clean up.
B．There was more garbage than before and they had to work harder.
C．The river had become so clean that a lot of water-birds came back.
D．The river was much cleaner and they had to search for garbage.
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单项选择题
A．No-smoking, double bed and quiet.B．No-smoking, single bed and quiet.C．Smoking, single bed and quiet.D．Smoking, double bed and quiet.
A．No-smoking, double bed and quiet.
B．No-smoking, single bed and quiet.
C．Smoking, single bed and quiet.
D．Smoking, double bed and quiet.
单项选择题
A．To buy up-to-date written material.B．To take notes in the library.C．To settle in right now.D．To look at those specialist journals in the field.
A．To buy up-to-date written material.
B．To take notes in the library.
C．To settle in right now.
D．To look at those specialist journals in the field.
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