﹣﹣﹣Can you tell me ________ you finally solved the problem？
﹣﹣﹣By turning to my parents.（ ）
| A． |
when |
B． |
where |
C． |
why |
D． |
how |
This is my pet dog．_____ name is Dingding．（ ）
| A． |
Its |
B． |
It's |
C． |
It |
Be quiet． Your grandmother _____ in the room．（ ）
| A． |
sleeps |
| B． |
is sleeping |
| C． |
sleep |
Mike and Jim's room is tidy, _____ their sister's is not．（ ）
| A． |
but |
B． |
and |
C． |
or |
About _____ of the students don't like studying online in my class， because they can't discuss with their classmates．（ ）
| A． |
one three |
B． |
one thirds |
C． |
one third |
You should take _____ umbrella with you in England， even on _____ sunny day．（ ）
| A． |
a；a |
B． |
an；a |
C． |
a；an |