31． —Could I have a look at the photo of your family， Sam

题目：31． —Could I have a look at the photo of your family， Sam

—Of course you ________ ．
A． may
B． can
C． could
D． must

喵查答案：B

31．B【解析】考查情态动词can的用法．在表示请求时可以用can，但用could语气更委婉;回答时，必须要用can．