had caused, caused, is causing; warned, warns, warn
Global warming_____ the Greenland ice cap to disintegrate much faster than anyone predicted. A study of the region's ice sheet_____ that, as a consequence, sea levels may rise more dramatically than expected.
is causing; warns
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。