Add the suffix “-ness” to the words given below. Then complete the following sentences with the words thus formed. Change the form if necessary. ( 在下面的单词后面加上后缀 “-ness” 。然后用这些词完成下列句子。如有必要,请更改 单词形式 。 ) sad friend ill weak loud beautiful 1. The doctor told him that his_______ was due to (由于) overwork( 劳累过度 ). 2. Don’t mistake her________for love. mistake...for 把 ... 错认为 3. The smile on his face could not hide his_______. 4. On the mountain top, you can enjoy the________of nature. 5. In fact, everyone has ________. ( 复数 ) 6. I cannot hear you because of the_________of the rock music.