单项选择题

Questions 18 to 20 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions. Now, listen to the passage.
What will happen to the workers if the machines are painted gray compared with orange

A．Workers may be more cheerful and energetic.
B．More errors and accidents will occur.
C．There is no difference at all.
D．They will be more active and curious.

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单项选择题

All of the following are true about the American teachers EXCEPT that they______。

A．are informal in class
B．try their best to create a relaxed atmosphere
C．care little about punctuality
D．are very easy-going and considerate

单项选择题

What can we know from the conversation about the Tai girl

A．When she was 19 years old she got a driving license.
B．She cannot cope with the new situations very well.
C．She lived in a tragic and cold family.
D．She has three years’ experience in daycare.

Questions 18 to 20 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions. Now, listen to the passage. What will happen to the workers if the machines are painted gray compared with orange 您的浏览器不支持 audio 元素。

Questions 18 to 20 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions. Now, listen to the passage.
What will happen to the workers if the machines are painted gray compared with orange