使不安"。也可作名词，重音在前。本句话里upset是过去分词，become的表语。

表示纷争的起因，用介词over. 例如：

The two countries often fight over border disputes.

They are always quarreling over minor differences.

6. Small problems become big ones, however, if they are not discussed and dealt with early on.

　然而，如果不尽早商讨解决，小问题就会变成大问题。

Deal: n. 数量，a (good/ great) deal of +不可数名词，交易，如： It's a deal(成交)；v.分配、经营。词组deal with 有 和....做生意、与...有来往、对待、对付、相关、处理等意思。它作"处理"讲时，要和do with区分清楚。deal with作"处理"讲时是指"怎样对付或解决"，提问时用how; do with作"处理"讲时是指"使用、处置"，提问时用what。例如：

How did you deal with pollution in the river?-We tried to treat the city's sewage before it poured into the river.

What did you do with the sewage?-- We treated it and recycled it for industrial use.

Early on：near the beginning"在早期、刚开始的时候"，多用于口语中。

7. Recently he has been refusing to do his homework, and instead insists on wasting his time watching DVDs and listening to foreign music.

　近来他一直拒绝做他的家庭作业，固执地把时间浪费在看DVD和听外国音乐上。

Have/has been doing是现在完成进行时，指说话前一段时间一直进行或多次重复的动作。

Insist on+n/doing sth: 坚持、坚决主张(做某事)；或insist＋从句 "that sb (should) do sth"。

要注意persist in＋n/doing sth也是"坚持"，但insist on坚持的是看法或主张,竭力主张去做某事；persist in坚持的是行为和做法，即不放弃正在进行的事情。例如:

He persisted in doing that experiment though the smell in the lab was getting worse and worse.

She insisted on going out for a picnic though the sky looked ominously dark.

8. What am I to do?

　我该怎么办？

相当于What shall I do? Be动词＋不定式表示按计划和情理将要或应该发生的事。例如：

The president elect is to make his inaugural speech on Monday.

You are to follow his instructions to the word.