【題目】There is no proof that people e in outer space.

【答案】見解析

【解析】exist

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【題目】Tom: I__________ (not see) anything of Jane lately. When __________ you __________ (see) last?

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【題目】I don't believe these reports of UFO s .

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【題目】—Did you find the missing couple in the mountain yesterday?

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科目：高中英語 來源： 題型：

【題目】Some inventions are so useful, but seem so simple, that we wonder why no one thought of them long ago.

Post-it Notes were invented about twenty years ago by Art Fry, a scientist at 3M Company. The idea for the product came from an awful experience he often had while singing in his church choir. Fry used pieces of paper as bookmarks to mark the places in his book of songs, but these bookmarks were always falling out. Around that time, Fry heard about a new adhesive (粘合劑) that a colleague, Dr. Spence Silver, had created. This adhesive was special because it was strong enough to hold papers together, but not strong enough to tear the paper when it was removed.

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