Antarctic _______ we know very little is covered with thick

Antarctic _______ we know very little is covered with thick Antarctic ,which we know very little,is covered with thick i Antarctic __________ we know very little is covered with thi Antarcitc about which we know very little is covered qith th ______cold weather it is! the river is covered with thick ic 将此句换为定语从句The Antarctic is covered with snow and ice all year ._______ top of _________ mountain is covered with _________ the river,____are covered with trees,is very long. This little girl is very _______(help) Mr Liang is our math teacher, we all like ____ thick _______ _______(play) with fire is very dangerous The ground is covered with