【单选题】
21. Thinking that you know ____ in fact you don’t is a disastrous mistake.
【单选题】
Don’t be too ____ about things you are not supposed to know. ?
【判断题】
I don’t know what you are talking about.
【单选题】
I don’t know you want to keep the letter, I’ve _____it up.
【单选题】
If you work hard, you will be ________; but if you don’t, you will be punished.
【单选题】
You don’t mind ______ you Xiao Li, do you?
【单选题】
13.Don’t ______ to let me know if there’s anything I can do for you.
【单选题】
If you don’t go, ____ I.
【单选题】
21. Study hard, _____ you will pass the exam.
【单选题】
14. Don’t turn the lights on, _______you ?