问题
选择题
—What’s wrong with your ipad? The sound is not clear.
—Yes. It has been broken for some time.
A．come out
B．coming out
C．to come out
D．came out
答案
答案：B
本题考查非谓语动词。所修饰名词The sound与come out之间的关系为主动关系，故用现在分词，选B。