Write down these useful sentences，___________you'll forget them.（ ）
A．andB．orC．butD．so
A lot of birds ________ in nature parks every year.
| A． |
protect |
B． |
is protected |
C． |
are protected |
D． |
protected |
He thanked me for ________ the mistakes in his homework.
| A． |
going out |
B． |
pointing out |
C． |
turning on |
D． |
putting on |
The painting is really valuable to him. He will never agree ________ it.
| A． |
sell |
B． |
sells |
C． |
sold |
D． |
to sell |
My aunt offered me a dictionary and I ________ it happily.
| A． |
accepted |
B． |
invited |
C． |
mixed |
D． |
grew |
We hope ________ a computer on every student’s desk in the future.
| A． |
there is |
B． |
there was |
C． |
there will be |
D． |
there has been |