题目内容
12．Smoking isharmful（harm）．分析 吸烟是有害的．
解答 答案：harmful．结合句子结构可知is在这里作为系动词，后面加上形容词构成系表结构，harm是动词或者名词，形容词是harmful，故答案是harmful．
点评 动词词尾加ful构成形容词
use-useful，care-careful，help-helpful，thank-thankful
peace-peaceful，forget-forgetful，play-playful，
succeed-successful，wonder-wonderful
练习册系列答案
名校通行证有效作业系列答案
相关题目
1．I don't know he will come or not this afternoon．（ ）
| A． | if | B． | when | C． | whether |
2．对世界各地的年轻人来说，这些服装是最受青睐的．
The are themostpopularchoice of clothing for young people around the world．
The are themostpopularchoice of clothing for young people around the world．
20．---Is Tom____boy in your class？
---Yes．Nobody is taller than him．（ ）
---Yes．Nobody is taller than him．（ ）
| A． | the tallest | B． | the strongest | C． | the cleverest |
7．My sister with my parents dumplings when I got home yesterday evening．（ ）
| A． | are making | B． | is making | C． | was making | D． | were making |