Take ______umbrella with you． It's____ useful tool on rainy days．（ ）
A．an， aB．a， theC．an， theD．the， the
Don't worry．Bill will help you look after your dog when you ________ away on business．（ ）
| A． |
are |
B． |
were |
C． |
will be |
D． |
have been |
You play the piano so well．________ do you take piano lessons？
I go to piano lessons twice a week．（ ）
| A． |
How long |
B． |
How many |
C． |
How often |
D． |
How much |
I think it's necessary to learn how to work in groups．
I quite agree．Sometimes it's even ________ than grades．（ ）
| A． |
less important |
B． |
more important |
| C． |
the least important |
D． |
the most important |
A true friend will never ________ from you when you're in trouble．（ ）
| A． |
take away |
B． |
run away |
C． |
put off |
D． |
get off |
When spring comes，trees begin to ________ green．（ ）
A．soundB．tasteC．keepD．turn