D )3.Children to swim in rivers. A.don’t allow B.isn’t allowed C.nustn’t allow D.mustn't be allowed C )4.-Did you talk back to your mother when you were a child? -Yes.But now I realize I was wrong.I really regret that silly thing to my mom. A.do B.to do C.doing D.did 导航页导航页 ( )3.Children to swim in rivers. A. don’t allow B. isn’t allowed C. mustn’t allow D. mustn’t be allowed ( )4.—Did you talk back to your mother when you were a child? —Yes. But now I realize I was wrong. I really regret that silly thing to my mom. A. do B. to do C. doing D. did D C