1．The number of students in our class is (be) more than 70 and the majority of them are (be) from the countryside.
2．How I wish I had slept (sleep) longer this morning, but I had to get up and go to school.
3．He owes his success to hard work and practice.
4．I would appreciate it if you could exchange seats with me.
5．With the development of economy, the number of cars is increasing very rapidly, thus resulting (result) in some social problems.
6．Hurry up! Mark and Carol are expecting (expect) us.
7． Absorbed (absorb) in writing a letter, he didn't even look up when I came in.
8．Tom apologized to me for his not being able to inform me of the change in the plan.
