下列各句有 A ， B ， C,D 四个画线部分，其中有一处错误，将其相应的字母标号填入句后的括号内，并在横线上加以改正。
Our teacher said light traveledfaster than sound.
A            B      C           D  
It’s very nice for you to help me with the advice.
A              B                   C        D    
—Whatwould you like to drink?  —Two cups of teas, please.
A       B            C                D        
The number of pandas is getting smaller and smallerbecause  the pollution.
A              B                C             D    
—I like this pair of football shoes. May I try on it ? —Yes, of course.
A                 B              C                D