单项选择题

The author says that in some hot and dry areas it is advisable to ______.

A．build big lakes to store water
B．construct big pumping stations
C．channel water from nearby rivers to cropland
D．build small and cheap irrigation systems

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单项选择题

In the eyes of the author, a successful engineering student is expected______.

A．to have an excellent academic record
B．to be wise and mature
C．to be imaginative with a value system to guide him
D．to be a technical genius with a wide vision

单项选择题

The word officials (Line 2, Para. 4) most probably refers to______.

A．the researchers involved in the experiment
B．the inspectors of the football tournament
C．the referees of the football tournament
D．the observers at the site of the experiment