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上传于：2024-07-12
高考重难点词汇练习三
选择正确的选项
1. Energy and sustainability experts say the answer to our future energy needs will likely come from a lot of _________—both traditional and alternative.
A) solutions B) growth C) competitions D) challenges
2.Most experts agree that some research activities are_________ to keep the staff and their students in touch with the latest developments in their subjects.
A) natural B) essential C) functional D) optional
3.Another issue is urban sprawl (无序扩展的城区).This is where citi