【单选题】
Directions: There are 10 blanks in the following passage. For each numbered blank, there are four choices markedA,B,C、andD、Choose the best one and mark your answer on theANSWER SHEET with a single line through the center.
{{U}} (55) {{/U}} every spaceship, the earth is a closed system. The only thing we receive from the outside is energy from the sun.Everything else must be used {{U}} (56) {{/U}} again. We astronauts don’t seem to realize that this spaceship is the {{U}} (57) {{/U}} one we’ve got. We {{U}} (58) {{/U}} its resources and waste the energy the plants have stored from the sun. If we {{U}} (59) {{/U}} our spaceship, we will destroy ourselves as well. Maybe if we look at the universe which surrounds us, we will appreciate our own spaceship more and take {{U}} (60) {{/U}} care of it.
B．resource
C．origin
D．supply
网考网参考答案：A
网考网解析：
[解析] 人们使用的太阳能来自太阳，太阳是能量的来源，故应选用energy source这一搭配。resource意为“资源”；origin意为“起源”；supply意为“供应”，如可以说The sun affords us a seemingly endless supply of energy.所以A选项是正确答案。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>
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