1.Our guide gave us a detailed（ ）of this painting but we still do not understand.
2.Physically we feel comfortable. But（ ）, we suffer a lot.
3.（ ）can be seen from the comparison of these figures, the principle involves the active participation of the patient in the modification of his condition.
4.We never _______ that John would become a doctor.
5.________ can be seen from the comparison of these figures, the principle involves the active participation of the patient in the modification of his condition.
6.What is your（ ）to his coming?
7.Mr. Wang _______ his wife and children when he went to the United States.
8.He（ ）his success to the good education he has received.
9.This is a _______ moment for our research. We should be careful.
10.Nothing can（ ）me to leave my own country.
11.Mary has a _______ view of our future. But nobody believes what she said.
12.Mary is always _______ when she doesn’t get any mail.
13.From the（ ）from this examination, we know it is too easy for the students.
14.Our _______ is London. But the plane took us to Paris.
15.I have（ ）three terrible English examinations this week.
16.Nobody knows who will be the（ ）of this city.
17.Nobody knows his（ ）for helping us.
18.In this kind of hotel, there are no（ ）rooms.
19.This is our（ ）. So you can do what you need to do here.
20.The roles expected ________ old people in such a setting give too few psychological satisfactions for normal happiness.
21.As a teacher, you should not（ ）the students from asking questions in class.
22.Our _______ talks promise a good future for our cooperation.
23.When I read the newspaper, I always read the（ ）first.
24.On a rainy day I was driving north through Vermont（ ）I noticed a young man holding up a sign reading “Boston”.
25.This textbook is for the _______ students, not for the beginners.
26.Talk to anyone in the drug industry,（ ）you’ll soon discover that the science of genetics is the biggest thing to hit drug research since penicillin was discovered.
27.Along the northern coast there are many deep（ ）.
28.This is our _______. So you can do what you need to do here.
29.Our（ ）is London. But the plane took us to Paris.
30.I wish you would give me a more detailed（ ）of you trip.
31.You should keep calm during your（ ）test. Do not be nervous.
32.Dr. Smith is（ ）in his research and does not know anything about politics.
33.They（ ）our house at $10,000.
34.A（ ）thing happened to me last night.
35.In general, my reaction is that we should（ ）carefully.
36.We need to _______ the purpose of the experiment again.
37.Doctors see a connection between increase amounts of leisure time spent（ ）and the increased number of cases of skin cancer.
B.to have sunbathed
38.This is an exciting area of study, and one ________ which new applications are being discovered almost daily.
39.Christie stared angrily at her boss and turned away, as though she（ ）out of the office.
40.The theory of _______ was developed by Darwin and is now understood by nearly everybody in the world.
41.Marlin is a young man of independent thinking who is not about ________ compliments to his political leaders.
B. having paid
C. to pay
D. to have paid
42.The Chinese food in the United States is usually（ ）for American people.
43.The best example of a paradox is the proverb ‘More _______, less speed’.
44.I would like to visit you and（ ）our friendship but in fact I can not come.
45.This tree is（ ）for its beautiful flowers.
46.Slides are sometimes called ________ film.
47.Mary is always（ ）when she doesn’t get any mail.
48.His eyes _______ with rage but he did not dare to say anything.
49.This factory is planning to build a new（ ）line this year.
50.There is more（ ）in meat than in vegetables.