had caused, caused, is causing; warned, warns, warnGlobal warmin

2024-08-22 11:33:58
英语语法(00831)

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.
【正确答案】：is causing; warns

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