Kate,remember________for the sick to cheer them up.A.to singB.not to singC.singing
读一读,找出每组单词中不同类的一个
-- _________ , Cindy! -- Good afternoon, Grace!
别人帮助了你,你应该说“________”
不明飞行物的英语缩略形式是_________.
--Are _______ your quilts, Mary? --No, ______ aren’t.