Many a plan ______ to fight against pollution.
A: have been worked out
B: have been worked on
C: has been worked out
D: has been worked on
A: have been worked out
B: have been worked on
C: has been worked out
D: has been worked on
举一反三
- For past 20 years, she _________ for the company. A: has worked B: have worked C: has been 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, Kevin has become experienced in foreign trade. A: Having worked B: Have been working C: Have worked D: Worked
- We ______ on it for many hours, but we have not yet reached any conclusion. A: are being worked B: are working C: have been working D: have been worked
- Mr. Green began to work in ABC Company in 1990. He ______ for ten years by next summer. A: will work B: will have worked C: has been working D: will have been worked