中国大学MOOC: Divorce rates in China have been _____________for ten consecutive years.
举一反三
- 中国大学MOOC: Working conditions have changed________ in the last ten years.
- Next week they（）in the factory for ten years. A: will be B: will have been C: are D: have been
- The report shows that there have been ________ improvements in some areas in the past ten years.
- 中国大学MOOC: In order to __________ the rising production costs, the subscription rates have been increased.
- Great changes ___ in the last ten years. A: have taken place B: have been taken place