Using a relative clause: Wind power is an ancient source of energy. People are now trying to harness wind power.
Wind power is an ancient source of energy which people are now trying to harness.
扫描二维码免费使用微信小程序搜题/刷题/查看解析。
版权声明:本文由翰林刷题小程序授权发布,如需转载请注明出处。