Chọn từ thích hợp điền vào chỗ chấm
B/
while
comes
for (ado)
cheap (adj)
developed (0)
expensive (ad
developing (0)
sun (n)
from the sun in one form
About twenty percent of the world's present energy already (1) comes
or another. Special devices have already been made available to put on the roofs of houses and flats to
contain the (2)
's rays and thus heat water. Thousands of these devices are now being used
more than a million solar
to provide energy in homes throughout the United States (3)
which
water-heating units have already been installed in homes in Japan. Other purposes (4)
solar energy is at present being used include the separation of salt from seawater, irrigation and sewage
disposal. Through most people in (5)
countries, the need is not for air-conditioners or
ways of cooking food, drying crops, and lighting homes.
tral heating but for (6)
while
comes
for (ado)
cheap (adj)
developed (0)
expensive (ad
developing (0)
sun (n)
from the sun in one form
About twenty percent of the world's present energy already (1) comes
or another. Special devices have already been made available to put on the roofs of houses and flats to
contain the (2)
's rays and thus heat water. Thousands of these devices are now being used
more than a million solar
to provide energy in homes throughout the United States (3)
which
water-heating units have already been installed in homes in Japan. Other purposes (4)
solar energy is at present being used include the separation of salt from seawater, irrigation and sewage
disposal. Through most people in (5)
countries, the need is not for air-conditioners or
ways of cooking food, drying crops, and lighting homes.
tral heating but for (6)