题目内容：
单词拼写1. The library is only open at c_____ times of day.
2. To a_____ one's purpose depends largely upon one's effort.
3. Students in this 1_____ may have problems with basic grammar.
4. He is always coming up with b_____ ideas for making money.
5. We have to finish, h_____ long it takes.
正确答案：
1. certain2. achieve3. level4. bright5. however
考点核心：
根据最新人教版版和牛津版的初中英语教材的词汇量，一个水平较高的初中毕业生的词汇量应在2400左右。初中的单词和词组词汇量要求数量会不断增长。
