My little brother didn't go to bed until he finished ________ his homework last night．（ ）
A．doB．doingC．to do
Who is singing in the next room？
It____be Lisa， but I'm not sure． （ ）
A．mustB．mayC．need
This year is_____70th anniversary（周年）of the founding of the People's Republic of China.（ ）
A．aB．anC．the
Shaoyang has changed a lot in the past few years．
Yes． It is getting_________． （ ）
A．cleanB．cleanerC．cleanest
Waiter! I'd like some Shaoyang rice noodles．
Sorry， sir． Rice noodles________only in the morning． （ ）
A．serveB．will serveC．are served
How do you improve your spoken English？
By practicing_______to my teachers and classmates． （ ）
A．talkingB．to talkC．talk