In the past few years there (be)（）a great increase in the amount of research on the brain.
举一反三
- In the past 50 years, there ________ a great increase in the amount of research _____ on the human brain.[1分]
- Great changes have taken place _______. A: in the last few year B: in the last few years C: in the past few years D: on the last year
- In the past few years, China ______ great achievements in economic development. A: was making B: had made C: has made
- over the past few years
- Over the past few years, Over the past few years,<br/>these companies have been able to maintain a steady (grow)<br/>______ <br/>in their business.