To our joy,there have been so many in science and technology

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To our joy,there have been so many in science and technology in the recent years.
A.discovery B.breakthroughs
C.findings D.invention

To our joy,there have been so many in science and technology in the recent years.
A.discovery B.breakthroughs
C.findings D.invention
选项是B
再问：为什么C不行？
再答：因为There be breakthroughs in...在……方面有突破；discovery发现；findings发现之物； invention发明(不可数名词)。

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