题目内容

There is a negative view of competing MP3 retailers.

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21（）

A. compel
B. ensure
C. promise
D. maintain

When will the train leave（）

At 9:50.
B. At 10:00.
C. At 9:10.
D. At 10:10.

The market will not sustain the present number of MP3 retailers.

I meant (buy) （） an evening paper for my dad but I didn’t see anyone selling them.