单选题I enjoyed all the other school subjects, but history ______.
A. above all
B. after all
C. at all
D. in all
单选题—"Where is your college located, John?"
—"It is ______."
单选题I think that the Great Wall is worth ______ hundreds of miles to visit.
单选题He has to wear glasses because he has such poor ______.
单选题______ the town was attacked by the storm several times, little damage was done.
单选题I sent in my letter, and the company gave me a/an ______ in a
week.
A. result
B. reply
C. review
D. answer
单选题Like the old, ______ respected in some countries.
单选题The making of glass is a very old industry at least 4,500 years old. Glass has many extraordinary qualities and it is frequently being used in new ways.
One of the most interesting new uses for glass is in telephone communication. Scientists have developed glass fibers as thin as human hair which are designed to carry light signals. When the light reaches the other end, it is first changed into electrical signals, which are in turn converted into sound messages.
Called light wave communication, the new system was used successfully in an experiment in Chicago in 1977. During the experiment, two glass fibers were able to carry. 672 conversations at the same time. The light wave cable, containmg 144 glass fibers, has the capacity to carry 50,000 conversations at the same time.
The light wave communication system has two important advantages. First, the glass fiber cables are smaller and weigh less than copper cables. Second, they cost less,
Perhaps it can be said that telephone communication has entered the age of light!
单选题He ______ TV all afternoon. I can"t get him away from it.
单选题A lorry ______ Jane"s cat and sped away.
单选题I ______ play tennis than golf.
A. like better to
B. prefer
C. would rather
D. had better
单选题I have rung the door bell for five minutes, but no one has come to
open the door. The Browns ______ out.
A. should be
B. would be
C. can be
D. must be
单选题______ more attention, the problem could have been solved sooner.
单选题It"s rude of you to shout ______ the room.
单选题Today there is widespread agreement among researchers that _______ of fathers from households causes serious problems for children.
单选题Seeing students so ______ in class is a great encouragement to a teacher.
单选题______, the crops would have died.
A. If it didn't rain
B. Had it not rained
C. If it doesn't rain
D. Should it rain
单选题The Rio Grande River forms part of the ______ between Texas and Mexico.
单选题So far every means ______ tried, but no satisfying result has come out yet.
单选题Some of the crops failed. ______, the cotton did pretty well.
