Which of the following sentences is correct？（ ）
| A． |
Many people wonder where has time gone． |
| B． |
Alice asked me what I do for waste sorting （垃圾分类）． |
| C． |
Could you tell me how far was it from here to your school？ |
| D． |
I don't know whether he will be back in a week． |
It's ten years since I _____ to study English．（ ）
| A． |
begin |
B． |
began |
C． |
has begun |
D． |
have begun |
Elsa lives on the _____ floor．（ ）
| A． |
nine |
B． |
ninth |
C． |
nineteen |
D． |
ninety |
The theater _____ to celebrate the Art Festival last month．（ ）
| A． |
decorated |
B． |
is decorated |
| C． |
was decorated |
D． |
has decorated |
My Chinese teacher often asks me _____ notes which reading a book．（ ）
| A． |
take |
B． |
takes |
C． |
taking |
D． |
to take |
The policeman give us much _____ on how to protect personal information．（ ）
| A． |
tip |
B． |
reason |
C． |
advice |
D． |
suggestion. |