精选优质文档-倾情为你奉上非谓语动词及从句专项训练本文作者： 1. No matter how bright a talker you are, there are times when its better _ silent.A. remain B. remaining C. remained D. to remain2. One of the meteor (陨石) pieces was found to have crashed into a frozen lake, _ a six-meter wide hole.A. left B. leaving C. to leave D. having left3. Scientists have warned that coral reefs are likely to become the worlds first ecosystem _ because of global warming.A. to disappear B. disappearing C. disa
