—Yes, she is. We often hear her ______ in the next room.

A. to sing   　　　　　　　　　　　　　　　　　　　　　　　　　　　　  B.sings

C.sing   　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　   D.singing

“Come here, Li Lei!” says the mother. “Give 　 1　 your school report (成绩单).” Li Lei gives it to his mother. “Oh, you fail 　 2　 !” says the mother. “You aren’t good at your lessons. Why not study 　 3　 at school?” “I’m sorry, Mom.” says Li Lei. “I’ll do well 　 4　 my lessons after you buy me a computer.” “Really?” asks the mother. “Yes,” answers Li Lei. “My teacher says computers can make people clever.” “ 　 5　 right,” “ says the mother. “Let’s go to the shop and buy one.” When 　 6　 come into the shop, the girl in the shop asks, “What can I 　 7　 for you?” “Yes, please,” answers the mother. “I’d like to have a look at your computers.” “There are 　 8　 kinds of computers here,” says the girl. “What kind of computer do you like, madam? These are table computers and those are portable (手提式的) 　 9　 .” Li Lei looks at the computers and asks, “Do you have a computer that can do homework 　 10　 me?”