4.He studied chemistry and then ________(改变) to biology.他原来学化学，后来改学生物。

(20)1. The room is 15 feet in ________(长度) and 10 feet in breadth.这房间长15英尺，宽10英尺。 2. This car will turn in its own ________(长度).这种汽车可以在自身长度范围内掉头.

3.You pressed the wrong ________(开关).你按错了开关。

5. I'm very ________(拮据，吃紧的)for cash at the moment can I pay you next week?我现在手头很紧－－下周再付给你行吗？ 6. My boot is _______(挤压)against a blister on my toe.我的靴子挤压了我脚趾上的水泡。

(19)1. Our glasses have been 　________(转移) this is mine. 咱们的玻璃杯对调了－－这个是我的。 2. Long lectures really ________(使人失去兴趣) me off.我觉得冗长的演讲很烦人。

2. You'll make your back ________(疼痛) if you carry those heavy buckets.如果你背那些沉重的桶，你的背会痛的。

(18)1. ________(按，压) this button to start the engine. 按这个按钮开动引擎。 2. Can you have your report ready for the ________(印刷) by next week?你的报告能在下星期赶好付印吗？ 3. The power of 　____　 _____(新闻界) is very great.新闻界的力量非常大。 4. The child ________(压，按)her nose against the window.那小女孩把鼻子贴在窗户上。

5. The accused got off/escaped scot-free because of ________(缺乏) of evidence.由於证据不足, 被告未受惩罚.

(17)1. I ________(疼痛) all over.我浑身疼痛。

4. Her decision seems to show a ________(缺乏) of political judgment.她的决定似乎显示出缺乏政治判断力。

4.These ruins are an eloquent ___________(提醒) of the horrors of war.这些废墟形象地提醒人们不要忘记战争的恐怖。

(16)1. 1. He is good at his job but he seems to ___________(缺乏) confidence. 他工作不错，但似乎缺乏信心。 2. The plant died for ___________(缺乏) of water.植物因缺水而枯死了。 3. ___________(缺乏) evidence resulted in their acquittal.因证据不足而宣判他们无罪.

3. This has been a timely ___________(提醒)of the need for constant care.这件事适时地提醒我们要注意时时谨慎。

2.He ___________(不断地) writes articles for the local paper.他经常给当地报纸写文章。

(15)1. This story ___________(使人想起) me of my childhood.这个故事让我想起了我的童年。 2. Please___________(提醒)me to write to my mother tomorrow.请提醒我明天给我母亲写信。

6.The film ___________(给人印象)me a lot. 这部电影给我留下了深刻印象。

(14)1. He drove at a ___________(不断的)speed.他以稳定的速度开车。