2021全国英语等级考试（四级）真题模拟10-17

1、It can be inferred from Paragraph 2 that human society will become increasingly ______.（单选题）

A. worried about life on other planets.

B. dependent on space tourism.

C. accustomed to long-distance flights.

D. associated with space exploration.

试题答案：D

2、PPL scientists will try to solve their problem by ______.（单选题）

A. removing the sugar molecule on the surface of pig cells.

B. distinguishing human tissues form those of pigs.

C. using the sugar-free nucleus in cloning a pig.

D. taking out the sugar genes from the cell of a pig.

试题答案：C

3、One important source of fat is ______.（单选题）

A. oil

B. grains

C. sugar

D. olive

试题答案：A

4、Penfield’s viewpoint was met with much ______.（单选题）

A. interest.

B. controversy.

C. compliments.

D. encouragement.

试题答案：A

5、What is true about Dolly according to the text?（单选题）

A. She was a lonely sheep in the first place.

B. She was manufactured out of the lab.

C. She was cloned from the cell of a mature sheep.

D. She was replaced by cloned piglets in terms of importance.

试题答案：C