— They are quiet, aren’t they?
— Yes. They are accustomed ______ at meals.
| A．to talk | B．to not talk | C．to talking | D．to not talking |
If you can buy a person’s friendship, it’s not worth _____ .
| A．having | B．being has | C．to be had | D．of being had |
If you had joined the chat room ten minutes ago, you _____ what we were talking about.
| A．will know | B．are knowing | C．can know | D．would have known |
When _____ who is their best friends, the boys usually hesitate before responding.
| A．asking | B．asked | C．ask | D．to ask |
Football is very important to me, but _____ is our friendship.
| A．as | B．so | C．also | D．too |
I am _____ first cloned monkey and I was born at _____ research center in the USA.
A. the; aB. an; the C. /; a D. the; the