Seen this ,the litte boy couldn't help ___________(笑）

Seen this ,the litte boy couldn't help ___________(笑） The boy fell off the bike and hurt his legs.He couldn’t help I couldn't help when the boy made faces to us 初中英语 the boy couldn`t help crying when he saw his favourite If you didn't help me,I couldn't pass the English exam this she couldn't help （）when she heard the news 1.to my____ ,the clever boy couldn`t answer this question I couldn`t help couldn't help I couldn't help The boy couldn't find the key _______ the door 【非谓语选择题】（ ）the key,the boy couldn't enter his house.