【題目】

He had been asked __________, but he didn't tell me the truth.

【答案】見解析

【解析】again and again

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He __________ (解釋) a difficult passage in a book.

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【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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B. He offered the new adhesive to Art.

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A. d b a e c B. b a e d c

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【題目】. ---Daddy, I want to watch my favorite program I AM a Singer tonight.

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用所給詞的適當(dāng)形式填空：

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