单项选择题

Most laboratory and field studies of human behavior ______ taking a situational photograph at a given time and in a given place.

A．involve
B．compose
C．enclose
D．attach
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单项选择题
John cannot afford to go to university, ______ going abroad.
A．nothing but
B．anything but
C．not to speak of
D．nothing to speak of
单项选择题
______ quantities of water are being used nowadays with the rapid development of industry and agriculture.
A．Excessive
B．Extensive
C．Extreme
D．Exclusive
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