about 改成 that
His ANXIETY (that his company MAY BE SOLD) is ill-founded.
括号里面的是进一步解释说明他的担忧的从句
整句意思是:他的担忧,即公司将被收购是完全站不住脚/没有根据的
另外第一个句子,把also改成 and ,或者as well as比较好,also不是连词不能这样用
His anxiety about his company may be sold is ill-founded.不对。
应改成His anxiety is about his company may be sold is ill-founded.
因为前半句His anxiety about中没有动词。
望采纳