改正在括号处标出!共十处错误!
David had a stomachache (去掉on) one morning.When he came (for) breakfast,he was crying.His mother asked why he (去掉was) cried.David said his stomach (去掉was) hurt.It was because he had eaten too (many) green apples the day before.She told him to go to Dr Scott's,(加入where) he would give him some medicine.
David got (去掉back) to Dr Scott's office at nine o'clock.He found four people (sitting) in the waiting-room.He (had) to wait for his turn.He didn't see the doctor (until) ten o'clock.When at last he sat down in the doctor's room,the doctor asked him what was the matter with him.