In the following words， which underlined （划线的） letters have a different sound from the others？（ ）
| A． |
brother |
B． |
throat |
C． |
them |
Excuse me， may I take the dog with me， sir？
_____．Pets are never allowed in． You can keep it in the Animal Centre next door．（ ）
| A． |
Yes， please |
| B． |
It's up to you |
| C． |
I'm afraid not |
Could you please help me look after my pet dog？ I will be away for about two weeks．
________! I will take good care of it．（ ）
| A． |
With pleasure |
| B． |
You are kidding |
| C． |
No way |
Tom，I wonder________．
In Beijing， the first city to host both summer and winter Olympics．（ ）
| A． |
where will the 24th Winter Olympics be held |
| B． |
where the 24th Winter Olympics will hold |
| C． |
where the 24th Winter Olympics will be held |
________has she been in Beijing？
Since five years ago．（ ）
| A． |
How far |
B． |
How soon |
C． |
How long |
Facial recognition（人脸识别）technology is widely used for payment． ________， we needn't enter the passwords any more．（ ）
| A． |
For example |
| B． |
As a result |
| C． |
What's more |