4. So another astonishing fact came to light.

come / bring to light: become seen or known

eg.

All the truth will come to light sooner or later.

3. They discovered that the farther away the feeding station was, the slower the dance was.

eg.

The higher we stand, the farther we see.

The sooner you do it, the better it will be.

2. In order to tell the bees apart, he painted some bees with little dots of colour.

tell apart: to be able to recognize the difference between two or more things or people.

eg.

The twins are so much alike that we can hardly tell them apart.

1. Among the different kinds of bee, it is the honey-bee that has interested scientists most because of the language they use to communicate with each other.

强调句结构：

It is /was …… that / who ……

eg.

It was in the house where they got married that they quarreled bitterly.

It was not until they received their son’s letter that they felt relaxed.

It was on October 1st, 1949 that New China was founded.

It was October 1st, 1949 when New China was founded.

15. It would be worth trying 　 　　 you should not get immediate success.

A. unless　　　 B. whether　　 C. as if　　　 D. even though

14. Temperatures in the United States　　　 　　measured according to the Fahrenheit Scale, on

which 32 degrees 　　　the freezing point of water and 212 degrees the boiling point.

A. are; is　　　　 B. are; are　　　 C. is; are　　 D. is; is

13. -He looks unhappy.

-Yes, but he can’t say what it is 　 　　　 is bothering him.

A. as　　　　 B. what　　　　 C. that　　　　 D. which

12. During the test we were supposed to stay in our seats, keep our eyes on our work,　　　　　　to anyone.

A. and not speak　　　 　　　　B. but could not talk　　

C. instead of speaking　　 　　　D. rather than speak

11. The stone under her feet rolled down; she was 　　　　into the river, and she called out for help.

A. being pushed　　 　 　B. pushed　 　　　 C. pulled　　 　 　D. being pulled