Please tell me the after service of the computer; I’m worried about        a breakdown sometime．

1. A.
   there being
2. B.
   it being
3. C.
   there is
4. D.
   it is

Please tell me the after service of the computer; I'm worried about ________ a breakdown sometime．

1. A.
   there being
2. B.
   it being
3. C.
   there is
4. D.
   it is

Please tell me the after service of the computer; I’m worried about        a breakdown sometime．

    A．there being B．it being     C．there is     D．it is

Please tell me the after service of the computer; I’m worried about 　　　 a breakdown sometime．【黑龙江省鸡西市第一中学2010-2011学年度高三第二次模拟考试】【非谓语动词】