we are at a tipping point in violent crime many cities这里tipping point

we are at a tipping point in violent crime many cities这里tipping point tipping tipping 是we at a great sale 还是 we are at a great sale we are at a great sale 这句话对吗? we are standing at the top of a A place where we are not interested in at all 还是 A place where we are not interested at all We are at your service We ( ) school today ,Miss Gao.A、are all at B、all are at C、are all at the D、all at We are going to _____Moon Park_____weekends.A.the,on B./,at C.the,at D./,in We are not sure which restaurant _______tonight.　A.eating at B.for eating C.to eat at D.we eat let's meet at the school gate at 1:00,__?A.will we B.shall we C.do we D.are we说明原因 We are at cshool We are school today Tipping Etiquette tipping point we （ ）interested （ ）are classes.A,do ；in B,are；in C,dies；in D,are；at we are at the good news A.surprised B.surprising C.a surprise D.surprise These clouthes are at a good price.We can a---- them.