A strong police force has been placed between the two ______ groups in the village to prevent fighting and killing.
举一反三
- a strong police force has been
- He has been fighting bravely against a _____ (晚期的) cancer for more than two years.
- Two fifths of the police _____ in the school near the town. A: has trained B: have trained C: has been trained D: have been trained
- In fighting the greenhouse effect, the governments has a strong role to play.
- An order ___________ by me. A: has placed B: has been placed C: was placing D: places