问题
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Why have there been difficulties with the machinery for the new product?A.It has been nece
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What can be inferred about the man?A.He has been to New Mexico many times.B.He has just gr
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What has the company been unsuccessful in doing?A.Branding efforts.B.Applying new technolo
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"Tom has been to New York" entails______.A.Tom has been to AmericaB.Tom has never been to
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Impatience has been around for a long time. There is nothing new about people losing their
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A new kind of radar has been developed for space-age travelers. A working laboratory model