More and more people have realized that clear waters and green mountains are as ______ as mountains of gold and silver．（ ）
A．centralB．specialC．valuable
June 1st is Day.（ ）
| A． |
Children |
B． |
Children's |
C． |
Child |
D． |
Child's |
The old man often tells them interesting stories，so they like very much.（ ）
| A． |
he |
B． |
him |
C． |
her |
D． |
she |
I'm going to be great scientist like Yuan Longping when I grow up.（ ）
| A． |
a |
B． |
an |
C． |
the |
D． |
/ |
-Do you know ________________？
-Yes.Next week.I'm preparing for it.
| A． |
when will we have the singing competition |
| B． |
when we will have the singing competition |
| C． |
where will we have the singing competition |
| D． |
where we will have the singing competition |
Protecting ourselves is one of ___________________ things we must do.
| A． |
important |
B． |
more important |
| C． |
most important |
D． |
the most important |