The missing boys were last _____(play) near the park?

The missing boys were last _____(play) near the park? The missing boys were last seen _____ near the river.为什么填pla The missing boys were last seen _____________ near the river The missing boys were last seen（） near the river. the missing boys were last seen 空格 near the river; a:playing The missing boys were last seen ____ near the river.(NMET94 the missing boys were last seen ()near the river.为什么不能选to pl The missing boys were last seen___ near the river.a,playing The missing boys were last seen playing near the river这里为什么用 The missing boys were last see the missing boys were last seen _____ the Net Bar.A.enter B. 非谓语的题、谢了!The missing boys were last seen ＿＿ near the river .