⑴We can't swim in the lake?{#blank#}1{#/blank#}                                        A.

⑵There is a toilet here.{#blank#}2{#/blank#}                                                B.

⑶We should keep quiet in the library.{#blank#}3{#/blank#}                         C.

⑷We can't walk on the grass.{#blank#}4{#/blank#}                                       D.  

⑸We can eat here.{#blank#}5{#/blank#}                                                        E.