1. 1) If the doctor had worn a mask, he would not have caught germs from the patient.

2) If the thief had worn gloves, he would not have left his fingerprints all over the place.

3) If he were here, he would help me to get through the difficulties.

4) If the film had been shorter, it would not have held children’s attention.

5) I wish you would look at the positive side of your husband. He is hard-working and

easy-going.

6) If there were a fire, your customers would be trapped inside. You have have only one

emergency exit on the ground floor.

7) The doctor suggests that I run two miles and do 50 sit-up every other day.

8) If someone offered to pay for a holiday for me, I would go round the world.

2. 1) To buy the house, the young couple got a loan from the bank and they had to pay back the

loan in 20 years.

2) Sue felt embarrassed when the teacher caught her peering at her neighbor’s test paper.

3) Before you buy a car, you’d better know what services the car dealer offers.

4) Ann strongly objected to her husband’s suggestion that she quit her job and stay home to

look after the kids.

5) We waited for jack at the railway station for two hours, but he didn’t show up. So we had

to go without him.

6) The villagers resumed searching for the missing child after the police brought two police

dogs.

Key to lesson 15 1. 1) T 2) F 3) T 4) T 5) F 6) T 7) F 8) F 9) T 10) T

2. 1) A 2) C 3) D 4) C 5) A

3. 1) 有其他一些关于飞行物的报道，有的是在空中看见的，有的是从地上看见的。

2）有人正在黑暗中注视着他。

3）那些过去一听到这种想法就嗤之以鼻的人现在也改变态度了。

4）他们朝树上的人开了一枪，可他并没有像一般人那样中弹倒地，而是像一张纸片那样慢慢从空中飘落下来。

5）这些发光体从西南方向向农舍靠近，两个发光体还能听到声音，发出很奇怪的声音。

6）路上行驶的汽车的灯光有时会在夜空中形成奇效，人们也许注意到的就是这些灯光效

果。

1．1) pointed 2) scientific 3) continually 4) unbelievable 5) naturally 6) mysterious

7) unusual 8) truthfully 9) unidentified 10) sight

2. 1) A. the sound that a weapon makes B. an injection of a drug