It'sdifficult________us________.

发布时间：2020-07-28 16:09:04

It's difficult ________ us ________.A.of; to breatheB.for; breathingC.to; breatheD.for; to breathe

网友回答

D解析It's+adj.+for sb.+to do sth.
以上问题属网友观点，不代表本站立场，仅供参考！