Agroupofchildrenwereoftenseen           inthedeeprivert...

問題詳情：

A group of children were often seen            in the deep river though there is a big sign “No Swiming”

beside it.

     A. swim       Ｂ．to swim      C．swimming　Ｄ．swam

【回答】

B

知識點：非謂語動詞

題型：選擇題