8.The solution of the problem was helpful.
9.He apologised his teacher by writing him a letter.
10.He passed the English test, it really surprised his teachers.
第三部分 单句改错（共10小题；每小题1分，满分10分）
1. is---are 2. of---for 3. why---what 4. of(第一个)--- with 5. like去掉
6. choose后加from 7.farther---further 8.of--- to 9.his前加to 10.it---which
