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Well goes an old saying, “Necessity is the mother of invention.” More often than not, inventions are made not because inventors set out to accomplish something big in the first place. 101 , they often stumble upon great ideas or discoveries 102 usefulness even they themselves are not aware of. The Post-it note, for example, was 103 the result of a failed experiment. Spencer Silver 104 was one of the inventors of the Post-it note, had tried to invent a strong glue. 105 the fact that he experimented with different chemicals, he was never satisfied with the results. The glue that he made ended up 106 very weak. He wasn’t disappointed, 107 . Rather, he tried to convince his co-workers of the potential of the weak glue, but they still took him lightly. Eventually, Silver’s weak glue drew someone’s attention. When Silver’s co-worker, Art Fry, sang hymns during church services, his bookmarks fell out of his hymn book again and again 108 really frustrated him. One day, it 109 him that using Silver’s weak glue on a piece of paper might help him mark the right page without damaging the book. It wasn’t until then did the two inventors find out 110 to deal with the weak glue, and the Post-it note quickly sold like hot cakes around the world.
【題組】110.
(A) what
(B) when
(C) whether
(D) how

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Hugh 大三上 (2018/03/15)
It wasn’t until then ☆☆☆ ☆☆☆ ...


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骨頭（一般警特行政正取） 大四下 (2019/12/13)

One day, it 109 him that using silver銀's weak glue on a piece of paper might help him mark the right page without damaging the book.

It wasn’t until then did the two inventors find out 110 to deal with the weak glue, and the Post-it note quickly sold like hot cakes around the world.


Well goes an old saying, “Necessity is t..-阿摩線上測驗