– Could I use your mobile phone? I have to call my mom for the ing class meeting.
--Yes, of course you .
A. must
B. can
C. need
D. will
网友回答
A. must
(答案→)B. can
C. need
D. will
解析：A. must 必须 B. can 能够 C. need需要 D. will将要；句意：我能用你的手机吗？我必须给我妈妈打个电话，叫她来参加班会。是的，你当然可以用。Could提问，表示非常有礼貌的请求，用can来回答，表示能够，故选B