With the improvement in transportation， students in some small villages no longer go on ropeways_______rivers to schools．（ ）
| A． |
to cross |
B． |
crossing |
C． |
crossed |
Sally's favorite _____ is orange．
I see．That's why all her sweaters are orange．（ ）
| A． |
fruit |
B． |
color |
C． |
juice |
That's the boy ____ won the first prize in the competition yesterday．（ ）
| A． |
who |
B． |
which |
C． |
whom |
We all look forward to ____ you again soon．（ ）
| A． |
see |
B． |
seeing |
C． |
seen |
Do you know ____ ？（ ）
| A． |
how old is he |
| B． |
how old he is |
| C． |
he is how old |
My sister ____ be lazy． But now she's working really hard．（ ）
| A． |
used to |
| B． |
is used to |
| C． |
was used to |