He felt very tired because he ______ 18 hours without a rest.
A: had worked
B: worked
C: was working
D: had been working
A: had worked
B: worked
C: was working
D: had been working
举一反三
- He didn't look well, for he _______ for sixteen hours A: had worked B: was working C: had been working D: works
- By the end of last week, he ________ in the company for 10 years. A: had worked B: had been working C: will have worked D: would have worked
- He in the company since he graduated from Lanzhou Vocational College two years ago. A: worked B: has been working C: had worked D: was working
- 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 ______ on a maths problem when he telephoned me early this morning. A: [A] had worked B: [B] was working C: [C] have worked D: [D] have been working