问答题

Why switch grass and Miscanthus were taken as energy plant?
A．Because they contain more cellulose.
B．Because genomes have been sequenced for clues to make other plants better energy crops.
C．Because some scientists are breeding a wide variety of candidate crops.
D．Because the spotlight is on this underdeveloped field.

A.Because
B.
B．Because
C.
C．Because
D.
D．Because
E.

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Which of the following best summarizes the main idea of the passage?
A．Plant Breeders' dream will come true.
B．Converting sugars from crops is a threaten to the food supply.
C．The research on the high energy plant is being done.
D．Cost-effective biofuels are very popular now.

A.Plant
B.
B．Converting
C.
C．The
D.
D．Cost-effective
E.

Why the individuals, companies as well as governments are desperate for farmland?
A．Because people get food mainly from farmland.
B．Because 50 million acres farmland vanish each year.
C．Because farmland is the potential investment.
D．Because people see the farmland as the root of all commodities.

A.Because
B.
B．Because
C.
C．Because
D.
D．Because
E.