It's not_______ good idea to work hard for four hours without_______ break.
| A．a; a | B．the; a |
| C．the; the | D．a; the |
My little brother was always getting into __ with my parents.
| A．decision | B．trouble | C．mistake | D．pride |
We had to ____our discussion because one of us suddenly got ill.
| A．take off | B．turn off. |
| C．break off | D．put off |
Johnny, you __ play with the knife, you __ hurt yourself.
| A．won’t; can’t | B．mustn’t; may |
| C．shouldn’t; must | D．can’t, shouldn’t |
-The winner of the race is a tall and thin boy with glasses.
--Then it___ be my friend, Mike, who looks like very fat.
A. might B. can’t C. don’t D should
I don’t have to introduce him to you __ you know the boy.
A. until B unless C. since D but