All over the earth’s surface is a layer of air which extends upwards for many miles. This air (1) the oxygen without which neither plants nor animals (2) live. Its movements, temperature and pressure (3) the weather, and it is a vehicle (4) the clouds of water vapour (5) condense and fall as rain. It forms a blanket which (6) us from the extreme heat of the sun during the day and (7) the extreme cold when the sun has (8)
It is chiefly (9) air that sound travels, so that if there were no air we should (10) practically nothing. The atmosphere is held (11) the earth’s surface by the gravitational pull of the earth -- that.is, it has weight. High up it is thin (12) near the surface it is compressed by the (13) of air above, and is more dense. The weight of air pressing (14) each square inch of surface at sea-level is nearly (15) pounds, which meansthat the
A. at
B. to
C. against
D. after
All over the earth’s surface is a layer of air which extends upwards for many miles. This air (1) the oxygen without which neither plants nor animals (2) live. Its movements, temperature and pressure (3) the weather, and it is a vehicle (4) the clouds of water vapour (5) condense and fall as rain. It forms a blanket which (6) us from the extreme heat of the sun during the day and (7) the extreme cold when the sun has (8)
It is chiefly (9) air that sound travels, so that if there were no air we should (10) practically nothing. The atmosphere is held (11) the earth’s surface by the gravitational pull of the earth -- that.is, it has weight. High up it is thin (12) near the surface it is compressed by the (13) of air above, and is more dense. The weight of air pressing (14) each square inch of surface at sea-level is nearly (15) pounds, which meansthat the
A. determine
B. choose
C. make
D. create
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