单选题He ______ Chinese history and knows a lot about it.

单选题Believe me, my memory is ______, if not better than it was in my teenage years.

单选题Mother was so weak after her operation that the doctors wondered if they would be able to ______ her through.

单选题 Not until he left his home ______ to know how important the family was for him.

单选题He has trouble understanding that other people judge him by his social skills and conduct .

单选题He is totally ___  to other people s attitudes. 

单选题A big dog ran in front of my mother's car and she ______ stop very quickly.

单选题It is unfortunate that, owing to lack of money, these experiments must now ______ before the objective has been achieved.

单选题Young John showed no consistency when he did excellent work the first part of the year and very poor work after that.

单选题It is impossible for so ( ) workers to do so ( ) work in a single day.

单选题He ______ reading silently at first.A. used not toB. didn' t use toC. was not used toD. is not used

单选题Meanwhile, I always Ukept in touch with/U my former professor at college.

单选题①John Roebling planned to build the Brooklyn Bridge before 1867. But he never really gotstarted. In 1869 , he died of an accident. The job fell to his son Washington , a master of construction.In 1872

单选题It has been revealed that some government leaders ______ their authority and position to get illegal profits for themselves.

单选题Many people believe the glare from snow causes snow blindness. However, the U.S. Army has now 27 that glare from snow does not cause snow blindness in troops in a snow-covered country. Rather, a man's eyes frequently find nothing to focus on in a broad 28 of barren snow-covered terrain. So his gaze continually 29 and jumps back and forth over the entire landscape in search of something to look at. Finding nothing, the eyes never stop searching and the eyeballs become 30 and the eye muscles ache. Nature 31 this irritation by producing more fluid which covers the eyeball. The fluid covers the eyeball in 32 quantity until vision blurs, then is 33 , and the result is snow blindness. Experiments led the Army to a simple method of overcoming this problem. Scouts ahead of a main body of troops are trained to shake snow from evergreen bushes, creating a dotted line as they cross completely snow-covered landscape. Even the scouts themselves throw lightweight, dark colored objects 34 on which they too can focus. The men following can then see something. Their gaze is 35 . Their eyes focus on a bush and having found something to see, stop scouring the snow-blanketed landscape. By focusing their attention on one object at a time, the men can cross the snow without becoming hopelessly snow-blind or 36 . In this way the problem ofcrossing a solid white terrain is overcome. A．landscape B．lost C．blurred D．increasing E．surveyed F．away G．determined H．arrested I．defined J．shifts K．obscured L．expanse M．offsets N．ahead O．sore

单选题Because of a recent obstacle in production, sales have dropped and accordingly profits have ______. A. declined B. increased C. broken D. maintained

单选题Wendy. How often do you check your E-mail? Linda:______.

单选题 Now listen to the following recording and answer questions16-18.

单选题 'The man talking with my mom is our math teacher' has all the following possible meanings EXCEPT ______.