第一个：they found the lecture hard___.答案选择的to understand 为什么不选

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第一个：they found the lecture hard___.答案选择的to understand 为什么不选 to be understood这里应该是被理解是很难啊为什么不用被动
第二个：she is going to town____.to have her watch repaired 我选的 to have repaired her watch

Hard to do 词组表很难去怎样怎样,是固定用法.
第二句 to have sth.done也是固定用法,而且to have 后面肯定不能继续跟一个动词啊

They found the lecture hard to understand.为什么不是“to be unders They found the lecture hard ( ).A.to understand B.to be unde they found the lecture hard ____. They found the lecture hard . 　　A. to be understood B. to un to their surprise,they found the lecture given by the famous they all felt sleepy because they found the lecture hard---- 英语单选题 They found the lecture hard ( ) I could not understand the lecture ,and___? i found it hard _____(understand ) him为什么要填to understand I found it hard ___(understand) him. 填什么?为什么?填to understand 选择一个正确的答案1.The teachers told me that they ________me to smoo they found ( ） hard understand this story