Bob didn’t go to bed _______ he finished doing his homework.
A. because B. until C. however
— Has your sister ever been to Shenzhen?
— .
A. No, she didn’t. B. No, she haven’t. C. No, never
Could you please loudly?
A. not speak B. don’t speakC. not speaking
How much time do you surfing the Internet?
A. take B. spend C. cost
Reading every day can make you .．
A．became a superstar B．getting clever C．become knowledgeable
The cat is very cute, ?
A. is it ? B. isn’t it? C. is the cat