选D is covered with 被覆盖着
the river (is covered with) ice four inches thick.
河面被4英尺厚的冰层覆盖着.
is covered with (is done + with,过去分词 + 介词) 表被动,with后面接被 '什么' 东西覆盖.
句子时态:现在完成时.语态:被动.
选D is covered with 被覆盖着
the river (is covered with) ice four inches thick.
河面被4英尺厚的冰层覆盖着.
is covered with (is done + with,过去分词 + 介词) 表被动,with后面接被 '什么' 东西覆盖.
句子时态:现在完成时.语态:被动.