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Câu hỏi:
The blue light emitting diode lighting _____in 1993
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A.
were invented
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B.
has been invented
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C.
was invented
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D.
is invented
Lời giải tham khảo:
Đáp án đúng: C
Hãy trả lời câu hỏi trước khi xem đáp án và lời giải -
A.
Câu hỏi này thuộc đề thi trắc nghiệm dưới đây, bấm vào Bắt đầu thi để làm toàn bài
CÂU HỎI KHÁC
- In 1992 the Western world celebrated that it was 500 years_____Columbus reached America
- In the same year, the Guatemalan Indian woman Rigoberta Menchú was awarded the Nobel Peace Prize ____ her work
- Rigoberta grew up in a country marked by ____ violence. Several members of her own family were killed by the army
- The blue light emitting diode lighting _____in 1993
- Japanese inventors have _____ lots of inventions in the modern times, especially in entertainment.
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