_____ do you go to the Net Bar (网吧)?— Once a week. [ ]

What does this modern-day dinosaur look like? —The tongue of this animal can be extended _____ of its body.

Teenagers must_______ the computer games.

There is _____ river at the foot of the mountain(山). _____ river is dangerous.

It’s a chicken-and-egg question. I can’t answer you now.