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單項選擇題

As far as the professor （）, college students should get into the habit of studying by themselves.

A．concern
B．concerns
C．concerned
D．is concerned

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單項選擇題

Ryan was late for the conference yesterday （） the traffic jam.

A．because
B．since
C．for
D．because of

單項選擇題

In my bedroom, there is a pair of scissors, a stack of books and （） flowers on my desk.

A．a(chǎn) piece of
B．a(chǎn) pocket of
C．a(chǎn) slice of
D．a(chǎn) bunch of

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