clear away, clear up, clear off

 clear away, clear up, clear off

  clear away表示“清除掉”、“收拾掉”、“散掉”、“消散”；clear up表示“露出（喜色）”、“（天气）放晴”、“清理”、“整理”；clear off表示“走开”、“离开”。

[EXERCISES]

1） We must ＿＿＿＿ such ideas among ourselves．

2） She ＿＿＿＿ her desk before she moved to another school．

3） The sky looks as if it would ＿＿＿＿ soon．

4） ＿＿＿＿ before I call the police．

5） His face ＿＿＿＿ when he read the letter．

Key: 1） clear away   2） cleared up  3） clear up   4） Clear off   5） cleared up