I think the ______ (four) lesson is the most difficult in this book.
fourth
暂无解析
swim_______(现在分词)
Let'sgo_____(shop)withmymother!
Look，mygrandmotheris_____mygrandfather
—Howmanycomputers_____inyourclassroom?
—Therearetwo.
Theseare______.Youcanbuyapairforyourmother.
