Half of the material ___ away.
A: has been taken
B: are taken
C: have been taken
D: were taken
A: has been taken
B: are taken
C: have been taken
D: were taken
举一反三
- Why haven't you taken the medicine It ______ before dinner A: should have been taken B: has been taken C: is taken D: should have taken
- The water will be further polluted unless some measures ______. A: will be taken B: are taken C: were taken D: have been taken
- Great changes _____ place since he left here. A: have been taken B: have taken C: were taken
- Although many measures （），the world's economy is still going down． A: were taken B: have been taken C: will be taken D: are taken
- Last year some additional measures ____ to protect personal information by the company. A: are taken B: were taken C: have been taken D: will be taken