1. As we all know,we cannot judge a book from its cover.
2. You should not ski alone in case you fall down.
3. When I first saw that piano,I could not wait to play it.
5. My teachers always remind me that with great efforts,comes great progress.(这是不错的说法,但是如果是交中学作业的话,写下面那种）
My teachers always remind me that the harder we study,the more progress we will make.
4. I am very keen on Mother Teresa (要大写的）,and she was awarded the first in 1979.(要翻译的话这样就可以了,但事实上,Mother Teresa won the Nobel Prize in 1979)
5句话,保证正确,有疑问可以再问我.