Jack often complains ( ) able to communicate with his parents.
A、of being not
B、of not being
C、being not
D、not being
【正确答案】：B
【题目解析】：complain to sb.向某人抱怨，complain about/of sth.抱怨某事， complain to sb. about/of sth. 因此句子为complaint of not being able to do sth. 句子含义是杰克经常抱怨不能与父母沟通。
