If you ___ (not know)the answer,you'd better ____(put)up your hands.怎么写,急

If you ___ (not know)the answer,you'd better ____(put)up your hands.怎么写,急 what if you know you could not fail what if you know you could not fail Do you know if ____back next week?If he ___ back,please let me know.为什么 If you ___( be not) here,I ___( not be ) here. i do not know if you _____.if you ____,please call me tonight(come) I ___(not sleep) well if I know there's work to do you know.I need you If you do not leave,I do not discard.Do not leave If she ___(know) you ____(come),she___(wait) for you here如题! If you know the world is upside down without you You will not escape. I love you ,Do not know if you can do for you,Thanks You know he is not going to let us leave early if we ___ get the work done.A.can't B.may not C.shouldn't D.mustn't为什么不选B 19 I must apologize for ___ ahead of time.That's all right a.letting you not know b not letting you know c letting you know not d letting not you know 需要详细分析 九年级英语【很简单的单词拼写1.You can't go out of the school without Mr Wang's____(permit)2.If I ___(fail)the exam,my parent would not take me to KFC3.I don't know if he ___(come) here tomorrow,if he ___(come)here tomorrow.he will call I really like you do not know if you feel it? If you do not know how ____(pronounce)a word,you find a dictionary. If you do not know what the world m___,you can ask the teacher for help. 补全对话,每空一词 A：Mum.I1、___ feel very well today.B:Oh dear!What's 2、___ you?.A：I don't know.I've got a headache and a cough.B:I'm sorry to hear that.you'd better stay 3、 ___ bed till tomorrow.If you are not beter 4、___ then,I'l