[单项选择]In Earth’s infancy, its surface was warm enough for life ____ the young Sun was fainter than it is today.
A. in spite of
B. whether
C. neither of which
D. even though

[单项选择] Text
If the sun has enough (26) to warm and light the whole earth, it must have enough power to do other things, (27) . Can we use the sun’s (28) energy to supply electricity, or at least to perform the function which electricity or other types of power usually perform The answer is (29) .
For example, people have for many years been using the (30) heat of the sun to cook by solar (31) which have been built with several incurred (32) reflecting the sun and focusing the heat on the cooking element. This (33) can be used like a gas or electric stove; it is more expensive to make but it doesn’t need any (34) and so costs (35) to use. Another (36) of using solar energy is in house heating.
The (37) of energy we use most is electricity, and every day more is (38)
A. as well
B. too
C. besides
D. either