? Fahlberg rushed back to work. He tasted everything in
53
, but they were not exactly the chemicals in the lab. Eventually, the chemist
54 what he was looking for: The matter in the beaker that had spilled was sweet-much sweeter than sugar. He
55
his discovery saccharin (糖精),the first artificial sweetener.
Dirty? delicious! If
this
56 shows us anything, it's that we all make mistakes, and that's not 57
. Mistakes
often take us in new
58
and help us invent new things. People who say something is impossible aren't always right.
A lot of things were “impossible” before someone 59
how to do them.
If you don't
60
right away, don't be afraid to try again and again.
41、 A、 food
B、drinks
C、 plants
D、 things
42、 A. dish
B、 candy
C、 bread
D、 surprise
43、 A、good
B、 careless
C、hard
D、 absent
44、 A、automatically
B、 accidentally
C、 naturally
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