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单项选择题


Questions 17-20 are based on the following passage. You now have 20 seconds to read questions 17-20.
What does the speaker suggest people should do when they go shopping

A．Avoid over-packaging products.
B．Use cloth napkins and cloth towels.
C．Not buy any products with plastic wraps.
D．Take their own bags to hold things in.
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热门试题

单项选择题How many solar heat panels do three or four bedroom homes usually need

A．Three or four.
B．Five or six.
C．Seven or eight.
D．Twelve or more.

单项选择题22（）

A．kinds
B．species
C．sorts
D．types

单项选择题What is the purpose of building new houses facing north or south

A．To avoid direct sunlight.
B．To limit space used.
C．To keep out the cold.
D．To conform to other houses.

单项选择题What’s the problem with paper napkins and plastic food wraps

A．They can’ t be recycled though they help people save time on housework.
B．They become trash and therefore are harmful to the environment.
C．They add cost to the product and thus make it more expensive.
D．Sometimes they are not strong enough to hold the purchase.

单项选择题Which is not true about solar heat collector panels

A．They look like sandwiches.
B．They can heat but not cool homes.
C．They cost about ＄300 each.
D．They are placed on rooftops.

单项选择题21（）

A．require
B．need
C．want
D．lack

单项选择题Why is insulation required in new houses

A．To limit discussion on heating bills.
B．To prevent heat loss.
C．To determine temperature in homes.
D．To convert homes to electric heat.

单项选择题What’ s the talk mainly about

A．Green house effect.
B．Garbage treatment.
C．Environment protection.
D．Over-packaging problem.

单项选择题What do we learn about the use of solar energy in the USA

A．It is very well established.
B．It is relatively new.
C．It is found in one million homes.
D．It is being rapidly expanded.

单项选择题What is the main topic of the lecture

A．Bicycles and cars.
B．Building codes.
C．Energy conservation.
D．New housing construction.