It is useful to be able to predict the extent ____ which a price change will affect supplies and demands.

按照书信要求写一封申请担任机械工程师的求职信。内容有：1. 在《中国日报》看到招聘机械工程师的广告；2. 申请者25岁，毕业于交通学院，取得工程技术学士学位，在学院的实验室中工作过三年，具有足够的经验；3. 随信附上个人简历并期待回复。

解决这个问题有种种方法。

他们正在寻找那逃掉的疯子。

他们很忙， 只是偶尔去看戏。

The meeting wasn’t held because you were absent.

我昨天没有见到她，我弟弟也没有。

我要是当初坚持把法语学下来就好了。

She is determined to be a singer no matter what difficulties she may met with.

If you have to jump, jump as far as you can.

The young man offered to take the old woman to the railway station.