1Forestscanhelppreve的精选

问题详情：用括号内所给单词的适当形式填空。1.Forestscanhelppreventwaterfrom________(run)away，sodroughtdoesn'toftenhappeninthisarea.2.Therearemany________(wolf)inthezoo.3.Scientistsdidn'tfindanything____...