(1) ___ sun has provided US with many uses. Thousands of years(2) ____ people began to dry clothes and food (3) ____ the sunlight. But it's not until recently that we (4) ___ been able to generate power from it. There are three main (5) ___ of using the Sun's energy : solar cells, solar (6) ____ heating and solar furnaces. One of the good points of solar energy is that an (7) ____ source. Moreover, it produces no waste or (8) ____ . Therefore, in countries with sunny climate, solar energy há great (9) ____ . However, it há some disadvantages as well, such as it doesnt work at (10) ___ and cost it very high
1 A the B a C an D x
2A before B lately C ago D recently
3A on B for C in D up
4Ahave B has C had d to have
5A methods B means C styles D ways
6Aair Bwater C SOIL D wind
7Aexpensive Bnon- renewable C limited D unlimited
8Apollution Bpollute C polluted D polluting
9A potent B potential C popentate Dpotentially
10A noon B day C night D morning
(1) ___ sun has provided US with many uses. Thousands of years(2) ____ people began to dry clothes and food (3) ____ the sunlight. But it's not until recently that we (4) ___ been able to generate power from it. There are three main (5) ___ of using the Sun's energy : solar cells, solar (6) ____ heating and solar furnaces. One of the good points of solar energy is that an (7) ____ source. Moreover, it produces no waste or (8) ____ . Therefore, in countries with sunny climate, solar energy há great (9) ____ . However, it há some disadvantages as well, such as it doesnt work at (10) ___ and cost it very high
1 A the B a C an D x
2A before B lately C ago D recently
3A on B for C in D up
4Ahave B has C had d to have
5A methods B means C styles D ways
6Aair Bwater C SOIL D wind
7Aexpensive Bnon- renewable C limited D unlimited
8Apollution Bpollute C polluted D polluting
9A potent B potential C popentate Dpotentially
10A noon B day C night D morning
