【 】 from his parents for a long time he was worried about them

问题描述:

【 】 from his parents for a long time he was worried about them
A not hearing B heard not D not heard 这三个选项哪里错了

三个都有语法错误,
这个句子需要定语形容词
正确的形式是
not having heard from his parents ...
这种 “因-果”句型叙述的“因” (没获得父母的信息)已结束,
例句:
having eaten,I feel full
not having eaten,I feel hungry