The water will be further polluted unless some measures ______.
A: will be taken
B: are taken
C: were taken
D: have been taken
A: will be taken
B: are taken
C: were taken
D: have been taken
举一反三
- The water will be further polluted unless some measures ________. A: will be taken B: are taken C: were taken D: had been 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
- 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 measuresto protect customers' personal information by our company. A: are taken B: were taken C: have been taken D: will be taken
- Half of the material ___ away. A: has been taken B: are taken C: have been taken D: were taken