12. let sb.down 让某人失望/沮丧
Please don’t let me down. 13. come up with 想出，提出=think of
He comes up with a good idea. 14. rest n.其余
the rest 做主语时，若代替可数名词复数，谓 语用复数，若代替不可数名词，谓语用单三。
In our class,some students are drawing and the rest are reading.
There is 10 yuan in the wallet.Four yuan is for you,and the rest is for me. the rest of +n.做主语，谓语动词的数应与of后的名 词的数保持一致。
❖
He did a good deal of research on this subject. ❖ research vi. “对…进行研究“，后接介词 into
❖ He is researching into the cause of cancer. 4. tie n.领带
He wears a blue tie. tie v.系，拴，绑 现在分词 tying tie….to…把…系到…上
come短语大聚会 come back回来 come from来自 come over顺便来访 come across 偶然遇到 16. cover…with…用…盖住
Don’t cover his face with the book. cover作名词，意为“盖子，封面”
I really like the cover of the book. 17. offer v.用作及物动词，有（主动）拿给，
给予的意思，相当于give，后可接名词或代 词作宾语，也可接双宾语，即offer sb. sth=o书破万卷，下笔如有神--杜甫
The rest of the workers are from countryside. The rest of the food has gone bad. 15. come out ⑴ 出版，发表
This magazine comes out once a week. ⑵开花
I think the rose will come out next week.
Unit 4
lion 百万 There are two million people in the city.
2.medical adj.医学的，医疗的 He is a medical student.
medicine n. 药物 3.research n.研究，不可数名词 常与do，make等连用，表示“做或进行研究工 作”，其后可接介词on，in，into，for等表示 研究的内容。
=The old lady does not feel tired at all. 11. plenty of 很多的，后接可数名词复数或
不可数名词均可，通常用于肯定句或否定句 中。疑问句中则用enough,much或many.
Is there enough money? a number of+可数名词复数
8.permission n. 允许，许可，准许 不可数名词 ask for permission 请求许可 with (one’s) permission 经过(某人的)许可 without (one’s) permission 未经(某人的)许可
He did it without permission. 9. bother v.使恼怒
confidence n.自信 have confidence in sth. 对某事有信心 =be confident of sth.
confidently adv.自信地 7. energetic adj.有活力的，精力充沛的 He is an energetic man.
energy n.精力，活力 She is full of energy.
5. what if 表示询问或提建议，相当于what should I do if….?
What if there is no water on the earth?
辨析 what if
what about
what if + 句子
what about + n./v-ing
6. pimple 小脓包，丘疹
vt.使烦恼 + n./pron. vi. 烦恼，费心，与about/with 连用
bother with sth.为某事费心
Don’t bother him!
10. not….in the slightest =not …at all 根本不
The old lady does not feel tired in the slightest.
get pimples 长痘，起疙瘩
7. confident adj. 自信的，有把握的
be confident of sth./that….对…有信心，确 信…
She is confident of passing the exam. =She is confident that she can pass the exam.