单项选择题

Environmental factors such as chemical treatments have a bad effect on the hair in the long nm.

A．环境因素，比如化学处理等对头发都不好。
B．从长远来看，环境，化学处理对头发都有影响。
C．从长远来看，头发被化学等因素的影响是很坏的。
D．从长远来看，环境因素，比如化学处理对头发都有不好的影响。

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单项选择题

Environmental factors such as chemical treatments have a bad effect on the hair in the long nm.

A．环境因素，比如化学处理等对头发都不好。
B．从长远来看，环境，化学处理对头发都有影响。
C．从长远来看，头发被化学等因素的影响是很坏的。
D．从长远来看，环境因素，比如化学处理对头发都有不好的影响。

单项选择题

He took it for granted that the boss would sign the contract.

A．他设想着老板会在这个合同上签字。
B．他拿上老板要看的合同去请老板签字。
C．他想当然地认为老板会签署这份合同。
D．他拿着老板要签的合同。

单项选择题

His failure to observe the safety regulations resulted in an accident to the machinery.

A．由于没有进行安全检查导致机器出现故障。
B．他没有按规定设定安全保障，结果导致生产工序发生故障。
C．他的失败显示了安全无规则导致了事故。
D．因为他没有遵守安全规则，导致机器出了故障。

单项选择题

Hard as he worked, he failed to support the whole family.

A．他努力工作，却未能支持一家人。
B．尽管他努力工作，却养不起一家人。
C．尽管他努力工作，却没有得到全家的支持。
D．无论他多么努力工作，也养不起一家人。

Vending machines (售卖机),sell many different types of items. Although there are many different types and sizes of vending machines, they all work in basically the same way. The customer puts a coin in the machine and then pushes a button, pulls a lever(杠), or opens a door to receive the merchandise. Some machines will also return change to the customer for paper money.

答案：售卖机销售许多不同类型的物品。尽管售卖机规格不同，品种不同，它们的工作原理基本相同。顾客向机器内投进一枚硬币，然后按动一...