（題文）— What did you do on April Fool’s Day?

— I played a trick my brother.

A. on B. to C. with D. at

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A computer program that could help catch and ever translates from aliens in outer space has been started by a British scientist.

If aliens are discovered one day, scientists fear their language may make it possible to understand them. But John Elliott of needs Metropolitan University in Britain has come up with a program that can figure out the structure(結(jié)構(gòu))of their language. He thinks that’s the first step in understanding what they are saying.

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