单项选择题

There are some tickets ________ for the concert given by a group of popular singers.The concert fans should be quick.

A.leave
B.left
C.leaving
D.leaved

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罗杰斯是生成目标的代表人物。()

答案：正确

单项选择题

Investment is freely transferable, which means one owner can sell his ownership interests to an ________ without a change in the nature of the business.

A.investor
B.person
C.owner
D.outsider