they found the lecture hard ____.

they found the lecture hard ____. they all felt sleepy because they found the lecture hard---- 英语单选题 They found the lecture hard ( ) They found the lecture hard ( ).A.to understand B.to be unde They found the lecture hard to understand.为什么不是“to be unders They found the lecture hard . 　　A. to be understood B. to un They found the article was hard ( ) to their surprise,they found the lecture given by the famous The___(hard) they study the ____(good) they will be. Finally,they found a ____ to the problem.(solve) 英语、句型转换1.They found him break the window .He ____ ____ ____ The police worked hard and fianlly they found the _____（call