注意该词组的不同搭配：in a solid state 以固体状态。in a bad state of health 身体状态不佳。in a good state 状态良好。
40. have experience in 在……有经验
He has a lot of experience in repairing TV sets . 他有大量的修理电视机的经验。
She has much experience in teaching English .
注意：experience 作经验是不可数名词，作经历是可数名词。
We had several terrible experiences on our trip . 我们在旅途中遇到了几件可怕的事。
41. hand tools out to workers 把工具分发给工人
42. carry out repairs to + 名词 “对……实施维修”
43. once in a while 偶尔，有时
I don\'t drink wine as a rule , but I don\'t mind a glass once in a while . 我一般是不饮酒的，但是我也不反对偶尔喝一杯。
44. have a shower 洗淋浴
45. depend on / upon sb to do 依靠某人干……
46. have a midday break 中午休息一下
47. give a tip to sb = give sb a tip 给某人小费
You had better give tips to waiters .
48. go/ make / take + on a tour of + 地点 “对……进行参观；到……旅游”
We are going to make a tour of New Zealand next summer .
49. spread across 传遍
The disease spread quickly across the village .
50. obey the rules for sb 服从对……的规定
D. 单元语法学习目标
复习动词的时态：一般现在时、现在进行时、现在完成时、一般过去时。
● 一般现在时（The Present Indefinite Tense）的测试 5 要点：
1、表示不受时间限制的客观存在、科学真理、格言等。
Water boils at 100 ℃ .
Twice two is four .
The earth goes around the sun .
Pride goes before a fall . 骄者必败。
One today is worth two tomorrows . 一个今天胜过两个明天。
Practice makes perfect . 熟能生巧。
Japan lies to the east of China .
Shanghai stands on the Huangpu River .
England and France are separated by the English Channel .
2、一般现在时表示经常地或者习惯的动作，常与频度状语 usually , often , sometimes , every morning , always , regularly 以及 at present , these days , nowadays , at the moment 等时间状语连用。
Mum doesn\'t drive as well as Dad . She stops too suddenly and turns quickly .
Peter used to work in Geneva , but at present he works in London .
The Hunts usually live in Scotland , but at the moment they live in the south .
Being middle school students , you do homework every day .
3、在口语中，一般现在时往往可和一个表示未来时间的状语连用，表达一个按规定、计划、安排要发生的动作。这种动词是：go , come , fall , arrive , start , begin , meet , stay , take , place , happen 等。
When do you start , Mr Green ?
This train leaves at 10:00 .
Miss Black comes next week .
— When do they leave for the countryside ?
— They start next Saturday .
A：Is there any meeting today ?
B：Yes . It begins at 2:30 in the afternoon .
4、在时间和条件状语从句中可用一般现在时代替一般将来时。
Please let me know when he comes back .
I will go to see him if it is fine tomorrow .
If he doesn\'t like it , nor / neither will I.
5、在某些以 here , there 开头的句子中用一般现在时表示正发生的动作。
Here comes the bus ! 汽车来了！
There goes the bell ! 铃响了！
● 现在进行时（The Present Continuous Tense）的 7 个测试要点
1、现在进行时表示说话时正发生的或者正进行的动作。常与时间状语 now , at the moment 等连用。
It is raining hard now . Don\'t hurry .