foot；    Monday；    tall；    smell；    recently

（1）The milk 　　sour． Don't drink it．

（2）This is a machine to warm our 　　in winter．

（3）It is difficult for me to get up early on 　　mornings．

（4）I haven't seen Cindy 　　． She must be busy with her work．

（5）The buildings in Wenzhou are 　　than most buildings in my hometown．