Đề 16

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1) There is evidence that prehistoric humans used fire --- 400,000 B. C.
a) so early b) the earliest c) as early as d) so early that

 
2) In the late 1800�s Ellen Richards, began work in the new field of �sanitary science� which was concerned with waste removal, water purification and ---.
a) to ventilate adequately b) adequate ventilation c) adequate ventilate d) ventilation adequately

3) --- red clover, high in protein content, is an extremely important leguminous hay and pasture plant of the eastern United States.
a) The b) There us the c) It is the d) That the

4) The topology of Mars is more --- than that of any other planet.
a) like that of the Earth b) the Earth�s like that of c) like the Earth of that d) that of the Earth�s like

5) Ostriches are --- of living birds, attaining a height from crown to foot of about 2.4 meters and a weight of up to 136 kilograms.
a) large, strong b) large and strong c) larger and strong d) the largest and strongest

6) The glaciers that reached the Pacific Coast were valley glaciers, and between those tongues of ice --- that allowed the original forests to survive.
a) that many sanctuaries were b) were many sanctuaries c) were there many sanctuaries d) there the many sanctuaries

7) --- orbits the Sun, Uranus rotates on its axis, an imaginary line through its center.
a) For it b) It c) As it d) There is

8) . --- duties are placed on commodities according to their value.
a) Ordinarily, tariff b) Ordinary tariffs are c) On ordinary tariff d) Tariffs are ordinarily

9) . --- about individuals who really existed and things that actually happened.
a) Folktales which sometimes tell stories b) The stories of folktales sometimes telling c) Stories sometimes told are when folktales d) Folktales sometimes tell stories


10) --- matter in one form is transmuted to another form, a phase change is said to have taken place.
a) Such b) Then c) Whenever d) Seldom
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