Question

阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空，并将答案填写在答题卡的相应位置上。

The earth was just 1.________ cloud of dust after the “Big Bang”. The earth exploded loudly with fire and rock. 2.________ were in time to produce many things，which were to make the earth’s atmosphere. As the earth cooled down，water began to appear on 3.________ surface. It allowed the earth to dissolve 4.________(harm) gases. Then life began to develop.

Small plants multiplied and filled the first oceans and seas with oxygen. This encouraged the 5.________(develop) of early shellfish and fish. Land animals such 6._______ insects，reptiles and dinosaurs appeared after green plants appeared. Small clever animals spread all 7.________ the earth. They are putting too much carbon dioxide into the atmosphere, 8.________ prevents heat from escaping from the earth into space. 9._______ life will continue on the earth for millions of years to come will depend on whether this problem can 10.___________(solve)．

Answer

1.a

2.They

3.its

4.harmful

5.development

6.as

7.over

8.which

9.Whether

10.be solved

【解析】

1.a cloud of dust是可数名词，翻译成乌云，所以要用冠词来修饰。

2.They 考查代词用法，横线所在的句子缺少主语，但是语法填空不能随意填写名词，所以只能用代词。

3.its 考查所有格形式。使用所有格的情况是：表示主语本身的时候，所以用it的所有格形式。

4.harmful 考查形容词用法。Gases是名词所以要使用形容词修饰名词。

5.development 考查名词用法。因为横线前面有冠词the，只有冠词修饰名词，所以划横线的词性是名词。

6.as 考查固定搭配。Suck as...诸如...在列举情况下使用。

7.over 考查固定搭配。all over the earth/world(遍及全世界）

8.which 考查非限制性定语从句的连接词。因为先行词是物，所以使用which。

9.Whether 根据后面的depend on...所以这里是一个选择的意味，所以使用whether。

10.