雅思词组1:flag down挥手使(车辆)停下

Yesterday I flagged down a cab to take me to the office-and had to direct the driver all the way.
昨晚我坐出租车去办公室，一路上还得指引司机怎么开。

雅思词组2:floppy disk软盘

You'd better use a floppy disk to save your blueprint.
你最好用软盘保存你的蓝图。

hard disk指“硬盘”。

雅思词组3:focus on集中(注意力、精力等)于

I'11 start with a brief history of East End, and then focus on life in the first half of the twentieth century.
一开始我将简要介绍一下伦敦东区的历史，然后集中讲20世纪上半叶伦敦东区的生活。

concentrate on

在稚思听力中，focus on后面接的一般都是考点，其他类似信号词有indicate等。

雅思词组4:for instance例如

Now, there are several hypotheses about the origins of the first Neolithic settlers in Ireland, but most of these contain problems. For instance, there are considerable archaeological difficulties about the theory that they came from England. The evidence doesn't really add up.
现在，关于爱尔兰的第一批新石器时代居住者的起源有几个假设，但是大多数的假设都存在问题。例如，有一个理论认为这些早期居民来自英格兰，但该理论存在许多考古方面的困难，证据完全不合情理。

雅思词组5:for lease/rent出租

There's an apartment for lease. Let's go and have a look.
有公寓出租。我们去看看吧。

雅思词组6:for one thing(用于列举原因)一来，一则

There are great practical problems about the theory that the settlers came directly from continental Europe. For one thing, it's not clear just how sufficient numbers of men and women could have been transported to Ireland to establish a viable population.
居住者直接从欧洲大陆过来这一理论存在很多实际的问题。一来，不知道要运送多少男人和女人到爱尔兰才足以建立起一个可存活种群。

on the one hand

雅思词组7:for the sake of为了…;符合…的利益

I feel you've often used complex structures and Iong sentences for the sake of it
我感觉，你过于频繁地使用复杂结构和长句子，为用而用。

in the interests of

雅思词组8:freak out处于极度兴奋中，行动反常

People often fume over the mistreatment of animals by merchants but and freak out, at an uptick in food prices.
人们经常对商人虐待动物的行为感到愤怒，又会对食品价格的小幅升高反应强烈。

雅思词组9:freeze over(使)被冰覆盖，封冻

The lake froze over in winter, so the children could go skating there.
冬天时湖面结冰了，孩子们可以去滑冰了。

雅思词组10:frequency of buses公交车发车频率

There are few people on this bus route so the frequency of buses on this route will be reduced.
这条公交线路的乘客很少，因此将降低此线路公交车的发车频率。