一.单词拼写
1．He sold his cow in ________(交换)for the money for his son's education.
2．Unless he can find a ________(赞助人)，he will be forced to retire from the athletics.
3．The clouds moved across the moon，leaving us in total ________(黑暗)．
4．Jeans are not ________(合适的)for the formal party.
