________hard before, Tom is afraid of failing in the exam.
A: Having been worked
B: Not to have worked
C: Having never worked
D: Never have worked
A: Having been worked
B: Not to have worked
C: Having never worked
D: Never have worked
举一反三
- I regret __________ hard at school, or I would have passed the exam. A: to have not worked B: having not worked C: not to have worked D: not having worked
- () here for 3 years, she has been quite experienced in dealing with those affairs. A: Having worked B: Having been worked C: Have worked D: Worked
- _____ in the company for three years, Mark has become experienced in business negotiations. A: Having worked B: Having been working C: Have worked D: Worked
- ________ in the company for three years, Kevin has become experienced in foreign trade. A: Having worked B: Have been working C: Have worked D: Worked
- ____ in this field for nearly 10 years, Mark has lots of experience and is fit for the position. A: Having worked B: Worked C: To have worked D: Have worked