The teachers encourage their students to________the problems by themselves，and in this way students can enjoy success．
A．give up
B．work out
C．look through
Why don’t you _____ your teacher for help when you can’t finish _____ it by yourself ?
| A．ask; write | B．to ask; writing | C．ask; writing | D．asking; write |
.We have two rooms_____ ,but I can’t decide _______.
| A．to live; to choose which one | B．lived; choose which one |
| C．to live in; which one to choose | D．live; which one |
The students were made _____ in the exercise books.
| A．hand | B．to be handed | C．to hand | D．handing |
-------How many students are there in the classroom?
------- ________ .They are all on the playground.
| A．No one | B．None | C．Nobody | D．Everyone |
Are these apples? Yes, ____
| A．they are | B．they’re | C．they aren’t | D．they’re not |