Being constantly exposed to advertisements is annoying, but it be pleasant sometimes.
A. shall
B. need
C. can
D. must
网友回答
A. shall
B. need
(答案→)C. can
D. must
解析:考查情态动词:句意:经常看到广告让人恼火,但有时也是令人愉快的。A. shall表示“命令,警告,允诺,征求意见”, B. need需要,C. can能,有可能,会,D. must必须,这里用can表示“有客观可能性”,选C。