单词拼写。根据中文提示，填入正确的单词。
1、I'm looking for a pair of black ____ (鞋)
2、John put the suit on, and then went to look at ____ (自己) in a mirror.
3、They talked on and on very ____ (高兴的) .
4、If you're not ____ (好) by then, I'll take you to see the doctor.
5、Thank you very much for ____ (指给) me the way.
6、They ____ (离开) five minutes ago.
7、If you learn even a little English, you will find it ____ (有用的).
8、The watch was the ____ (便宜) one in our country.
9、There are three ____ (德国人) in his factory.
10、May is the ____ (五) month of the year.