31.He drove very fast to _______ that red car.
32.Slides are sometimes called ________ film.
33.Professor Smith _______the most important part in his paper.
34.This knife is made of steel _______ and it can be used for a long time.
35.The theory of _______ was developed by Darwin and is now understood by nearly everybody in the world.
36.Mr. Green has recently been _______ to director of the president’s office.
37.We don’t think that his _______ ability has been well developed.
38.Our _______ talks promise a good future for our cooperation.
39.The _______ can help people to see very small objects.
40.Physically we feel comfortable. But _______, we suffer a lot.
31.B 32.D 33.A 34.B 35.D
36.C 37.B 38.C 39.C 40.A