In what way are water scooters said to be an environmental nuisance ？（）

单项选择题What make customers find surprising about Harrods ？（）

A．Its power bill reaches ￡9 million a year.
B．It sells thousands of light bulbs a day.
C．It supplies power to a nearby town.
D．It generates 70% of the electricity it uses.

单项选择题Professor Bruce Lahn of the University of Chicago predicts that （）.

A．humans won’’t have to donate organs for transplantation
B．more people will donate their organs for transplantation
C．animal organs could be transplanted into human bodies
D．organ transplantation won’’t be as scary as it is today