Which of the following statements is true（）
A: The engineer had worked out the idea for many years.
B: The engineer had been working on the idea for many years.
C: The engineer suggested the idea to the British government and industrial circles for many years.
D: The British government and industrial circles accepted the idea many years later.
A: The engineer had worked out the idea for many years.
B: The engineer had been working on the idea for many years.
C: The engineer suggested the idea to the British government and industrial circles for many years.
D: The British government and industrial circles accepted the idea many years later.
举一反三
- As he had worked in the army as an electrical engineer for many years, he had every _______ for the job.
- How many years has Richard been working in this company? ________ years.
- How many years had he lived in Beijing A: 20 years. B: 15 years. C: 10 years.
- How many years have the woman been working in A: Two years. B: Three years. C: Five years. D: Eight years.
- The idea was introduced many years ago and it has greatly influenced________