It is the firm belief of astronomers that there are living creatures on other planets. It is also their earnest wish that some day contact may be made【C1】______such living creatures by sending messages with the help of radio signals. The【C2】______of communicating with people on other planets may one day come true since radio telescopes have now been invented. Scientific projects of various kinds are now being launched to【C3】______signals or to receive signals from distant planets. The question now【C4】______. What sort of message should be sent so that it could be understood. To send a message in any language would be impractical as it would【C5】______not be intelligible.【C6】______is the opinion of scientists that a signal in the form. of a simple arithmetic sequence might be understood. Scientists think that pictures might also be understood, so it would be a good idea to send pictures of the people【C7】______our planet. Pictures of domestic animals together with various crops we【C8】______for our food might also be sent. Pictures of houses and buildings might【C9】______further information about our life and society. As time goes on, TV pictures might be sent which would make the beings on other planets aware【C10】______the life and the level of civilization on our planet.
【C1】
A．with
B．upon
C．by
D．to

未分类题College has many social attractions, some of which can be distractions. Sports, concerts, parties, and dormitory bull(废话)sessions can be very【C1】______consuming. The temptation to stay up too late at night or sleep too late in the morning is always present, so self-discipline is an important lesson to learn. In【C2】______, many students have part-time jobs, especially in the U. S. where most students have cars and are expected to help their parents pay for【C3】______or college housing. Students and their parents may disagree on how much time should be【C4】______to studying. But they usually agree that in addition to some【C5】______and possibly some fun, one of the【C6】______of a college education should be a good job. Students who have already worked at part-time jobs have an advantage in the【C7】______market, but this is not the only way to improve ones chances. Many colleges have internships(实习)or co-op programs to give students practical【C8】______in their future careers. Others have special classes where students can practice their application forms and letters, resumes, personal statements, and employment【C9】______Most colleges have career counselors and either career days【C10】______career fairs where students can meet potential employers and learn about career alternatives. Recently many jobs have been listed on the Internet, making it easier to match students with suitable opportunities.【C1】A．timeB．moneyC．resourcesD．goods

未分类题The number of registered candidates for this years entrance examination to masters degree programs is twice______.A．of last year'sB．those of last year'sC．of those of last yearD．that of last year's

未分类题Ted has told me that he always escapes______as he has got a very fast sports car.A．to fineB．to be finedC．being finedD．having been fined

未分类题【C3】A．mustB．have toC．shouldD．had better

未分类题What does the fisherman do right after the bird catches a fish?A．He throws the dead fish back into the river.B．He gives the dead fish to the bird as its food.C．He draws back the bird onto the deck of the ship.D．He snatches the dead fish from the bird's beak.