(3)（尤指意想不到地）发生

I will let you know if any change comes up.

(4)被提出讨论，被谈到；引起注意

The subject of planting came up in the conversation.

(5)（太阳、月亮）升起

We watched the sun come up.

(6)出席，参加，到场

We came up for the party.( total eclipse)

9.over prep.& adv.

(1)prep 相当于during，意为"在......期间"

(2)表示时间时，还可表示"一边......，一边......，正在进行......的过程"

The girls sang over dancing.

(3)超过

You are over ten.

(4)adv. 完了，结束

Class is over.

10. base vt. & n.

辨析：base与basis

base:表示具体含义，意为"根基、基础、底座"

e.g. the base of a building

basis:表示抽象含义，即"非物质方面的基础"

e.g. the economic basis 经济基础

11.present

(1)adj. （前置定语）现在的，当前的；（后置定语）出席的，在场的

e.g. Did you see the present CEO?

　　Did you see the CEO present?

be present at 出席，反义词组为：be absent from缺席

(2)n. (C)礼物

(3)n. 目前，现在

e.g. The boy present at the meeting was considering asking his father for a book on the present tense as a birthday present.

12. enrich

en-+ adj. /n.---- vt. enable, enclose, encourage, enforce, enlarge, ensure, entitle

13. make use of

take advantage of 利用，趁机，占......的便宜

make the best of 指（对不利的条件等）充分利用

make the most of 指尽量利用有理的条件