1 Many students come to school on foot instead by bus.
2 Mr Black was considering to write the article.
3 This is one of the poems which was written by Li Bai.
4 The police came to save the little girl who was dangerous.
5 That was the only reason why she explained to the teacher.
6 She has two brothers, none of them is a doctor.
7 His mother often told him not to stay up, that would be bad for his health.
8 The scientist devoted his spare time to do research.
9 Wilson got marride with a French girl last weekend.
要说明原因。