They had been working on _____ a dictionary for a couple of years.
A: weaving
B: knitting
C: writing
D: compiling
A: weaving
B: knitting
C: writing
D: compiling
举一反三
- How many years have the woman been working in A: Two years. B: Three years. C: Five years. D: Eight years.
- How many years has Richard been working in this company? ________ years.
- He ______ in the Bank of China for five years by the end of last year. A: was B: had been working C: has been working D: worked
- I had been working a couple of months ______ I had a letter from Mike. A: when B: until C: that D: while
- 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.