we can not sign you at this

we can not sign you at this look at the sign!you can not b__your dog here we can often see this sign "THIS SIDE UP"( ) A.in a box B.at Exccuse me,sir.You can not smoke here.Look at the sign.--Sor look at the sign.you can not pick flowers here!sorry,I ( )it This sign m( ) we should not walk on the grass this sign means we can turn left here this sign tells us ___ The sign means we can go out here改为否定句 This sign [ ] [ ] we So we can sign up the contract this time Look at the sign.You can( )your car here can you see a sign at there?哪里错了? not in the least we can't have such a bad day at this time o