1 problem 找麻烦的，成问题的，惹乱子的

problem child

2 leave noun 准许，许可

to be absent without leave 未经许可擅自离开

3 find+adj.

E.g. I find you sad.

I find this question difficult.

4 air 感觉，印象，神态

an air of freedom

an air of luxury

5 social climber 攀权附贵的人

party goer 爱参加聚会的人

6 violent and lovely contrast 鲜明的对比

7 filial 子女（对父母）的

filial duty

filial piety

8 presumptuous 自负，冒昧

9 the rub 问题，困难

e.g. The hotel is in the middle of nowhereand there lies the rub. We don’t have a car.

10 equal 同等的

be without equal/have no equal 无与伦比