单项选择题

A．They are built to produce more fruits and wheat.
B．They are naturally air-conditioning and water-saving houses.
C．Most of green houses are used only in winter for heating.
D．People try to save energy as much as possible.
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单项选择题
A．Spring.B．Summer.C．Autumn.D．Winter.
A．Spring.
B．Summer.
C．Autumn.
D．Winter.
单项选择题
A．The tiring journey to and from work also contributes to the working injuries.B．A large number of workers in Great Britain are likely to get hurt at work because of too long working time.C．Companies will initiate working safety programs very soon.D．The 48-hour European Working Time Directive is to protect workers from unfair payment over long working hours.
A．The tiring journey to and from work also contributes to the working injuries.
B．A large number of workers in Great Britain are likely to get hurt at work because of too long working time.
C．Companies will initiate working safety programs very soon.
D．The 48-hour European Working Time Directive is to protect workers from unfair payment over long working hours.
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