83.The environmentalists said wild goat's ____ on the vast grasslands was a good indication of the better environment.

A.escape B.absence C.attendance D.appearance

84.With a _____ of snow covering them,the small hills look very beautiful.

A.cloth B.blanket C.bed D.sheet

83.答案是D,此题考查词汇，appearance，出现。

84.答案是B，blanket,毛毯，句意:小山被雪覆盖看上去很美。