单项选择题

An enormous number of people in the world" s poorest countries do not have clean water or adequate sanitation______.

A．capacities
B．facilities
C．authorities
D．warranties
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单项选择题
Today investigators are still far from______a master map of the vasculature of the heart.
A．constituting
B．decoding
C．drafting
D．encoding
单项选择题
Family-planning clinics give out______ advice to people who have decided to limit the size of their families.
A．insensitive
B．interrogative
C．contraceptive
D．communicative
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