求翻译（无语法错误）

Question

1.碰巧那天他的车堵在路上了（stuck)
2.他极力对家人隐瞒自己抽烟的事（conceal)
3.如今，在很多学校，老师已经用电脑取代黑板上课了（replace)
4.当他换了新发型出现在教室，全班哄堂大笑（with复合结构，laughter)

Answer 1

1碰巧那天他的车堵在路上了（That day happened to his car stuck in traffic）

2他极力对家人隐瞒自己抽烟的事（He strongly to conceal their smoking family ）

3如今，在很多学校，老师已经用电脑取代黑板上课了（Now, in many schools, teachers have been replaced by computer to class blackboard）

4当他换了新发型出现在教室，全班哄堂大笑（With his new hairstyle appeared in the classroom, the class burst into laughters）

Answer 2

1碰巧那天他的车堵在路上了（That day happened to his car stuck in traffic）
2他极力对家人隐瞒自己抽烟的事（He tried to hide their smoking on the family thing
）
3如今，在很多学校，老师已经用电脑取代黑板上课了（Now, in many schools, teachers have been replaced by computer to class blackboard
）
4当他换了新发型出现在教室，全班哄堂大笑（When he appeared for a new hair style in the classroom, the class burst into laughter
）

Answer 3

1. He happened to be stuck on the road.
2. He exhausted himself to conceal the fact that he smoked.
3. Nowadays, in many schools teachers replace blackboard with computers to teach.
4. With his new hairstyle appeared in the classroom, the class burst into laughters.

Answer 4

1. Happened to that day his car stuck in the traffic。

2. He tried to conceal themselves to the family of smoking。

3. Today, in many schools, teachers have used computer replace the blackboard in the class。

4. When he changed the new hairstyle appeared in the classroom with laughter in the audience。

Answer 5

1.It happened that his car was in a traffic jam that day.
2.He tried his best to conceal it from his family that he smoked.
3.Nowadays in many schools the teachers are having their lessons with blackboard replaced by computers.
4.When he appeared in the classroom wearing the new hairstyle,the whole class burst into laughing.