______the ground covered with ice, the road has become very slippery.A．AtB．AlongC．OnD．With

—__________________— With pleasure. Emergency planning covers several different aspects.

The maximum sea ice cover is about______.A．17,000 sq kmB．170,000 sq kmC．1,700,000 sq kmD．1

The little valley beneath the ivy－covered hills became ______ with white shirts.A: do

The skaters moved over the ice with a smooth, effortless _______.A. graceB. gloryC. gl

Antarctic _____ we know very little is covered with thick ice all the year round. A．which B．that C．w

Look this roof is covered with____________leaves