He found it increasingly difficult to read, his eyesight was beginning to fail.A. though

发布时间：2020-08-17 11:54:01

He found it increasingly difficult to read,      his eyesight was beginning to fail.
A. though         B. for        C. but          D so

网友回答

解析：这是一个原因连词。原因连词for表示的原因并不说明主句行为发生的直接原因，只是提供一些有利于说明情况的补充说明, 且不可位于主句前。
以上问题属网友观点，不代表本站立场，仅供参考！