下列句子中各有一处错误，请选出来并在横线上改正。
【小题1】There arefourballoon. （______）_____________
A B C
【小题2】How many studentare there in your class? （______）_____________
A B C
【小题3】What do you do onan English class? （______）_____________
A B C
【小题4】Are you likemusic? （______） _____________
A B C
【小题5】There is two sofasin the living room. （______）_____________
A B C
