They are ( )these books in the box.A.puts B.put C.to put D.puttin_英语解答

They are ( )these books in the box.A.puts B.put C.to put D.putting
选择,最好帮我讲解一下.

人气：467 ℃　时间：2020-03-24 09:50:18

解答

D
他们正把这些书放到盒子里.现在完成时.are提示了,故用are putting