英语：选出正确的选项,使每个句子符合语法规则
1.It'll do harm to you to lie in bed__
A read B and reading C to read D reading
2.He had no difficulty ____the problem.
A.working to B.having worked out c.to have worked out D.to work out
请回答者详细说说选择什么!为什么选这个理由!分析下