Never put off____tomorrow what you can do today．（ ）
A．untilB．beforeC．whenD．as
If the company fails to make enough money，it will have to （ ）
| A． |
take away |
B． |
close down |
C． |
break up |
D． |
set off |
Did you call Fred back？
I didn't need to， I'll see him tomorrow．（ ）
| A． |
because |
B． |
unless |
C． |
when |
D． |
though |
That's all I have to say．Is there anything you'd like to ？（ ）
| A． |
talk |
B． |
require |
C． |
hold |
D． |
add |
Is it OK if I sit on this chair？
Sorry． （ ）
| A． |
Here you are． |
B． |
Take it． |
| C． |
Not at all． |
D． |
It's taken． |
If there's a lot of work ，I'd like to keep on until it is finished．（ ）
| A． |
do |
B． |
to do |
C． |
done |
D． |
doing |