[填空题]The sea is the largest unknown part of our world. It covers (36) percent of the earth. There is still much to be discovered about this (37) blanket of water.
Some scientists are studying ways of bringing the ocean’s huge (38) of water to the deserts of the world. Others hope to control the weather by learning more about the (39) of heat and moisture between the ocean and the air. Others, are studying the ways in which sound travels and is (40) by water and heat. What happens when seawater touches different elements is another (41) of study.
(42) the ocean floor is an important work among so many interesting studies. (43) , only a very small part of the ocean has been mapped. Now underwater photography is used in mapping parts of the ocean floor. (44) .
If the waters of the ocean could be moved away, the sea floor with its wide valleys, uneven mountains would be an unbel

[单项选择]
Friends play an important part in our lives, and although we may take the fact of friendship for granted, we often don’t clearly understand how we make friends. While we get on well with a number of people, we are usually friends with only a very few-for example, the average among students is about 6 per person.
Moreover, a great many relationships come under the blanket term "friendship". In all cases, two people like each other and enjoy being together, but beyond that, the degree of intimacy between them and the reasons for their mutual interest vary enormously.
Initially, much depends on how people meet, and on favourable first impressions. As we get to know people, we take into account things like age, race, physical attractiveness, economic and social status, and intelligence. Although these factors are not of prime importance, it is more difficult to relate to people when there is a marked difference in age and
A. Right
B. Wrong
C. Not mentioned