Although _____ very hard, he failed to turn in his research paper on time.
A: worked
B: has worked
C: works
D: working
A: worked
B: has worked
C: works
D: working
举一反三
- Danny ________<br/>hard for long to realize his dream and now he is popular. A: works B: is working C: has worked D: had worked
- Although ______ very hard, he failed _____ the work in time.
- All these days he ______on his paper. A: has worked B: has been working C: was working D: is working
- I first met Mary four years ago. She _____ at a shop at that time. A: has worked B: Works C: was working D: has been working
- Tony Green has worked very hard to make his dream a (real) ______ .