[单项选择]When we returned from the ball, we found that our house ______ and many things ______.
A. has broken into; has been stolen
B. has broken; had been stolen
C. had been broken into; stolen
D. had been broken; stolen

[单项选择]We returned school late from a party and found the door of the students’ apartment （）
A. had closed
B. close
C. to close
D. closed

[填空题]When I returned home from a long journey, I found my house (break)（）into.

[简答题]

Ah, blissful sleep, when we leave our daily toils behind and slip into mindless repose. Or do we (46) Two reports in Science, one involving rats and the other humans, suggest that during sleep our brains remain quite busy, furiously consolidating important memories that have accumulated during the day.
In the rat experiments, Matthew A. Wilson of the Massachusetts Institute of Technology and Bruce L. Mc Naughton of the University of Arizona inserted electrodes into the hippocampus, a region of the brain thought to be involved in spatial memory. As the rats learned to navigate a maze, their neurons fired in certain patterns corresponding to specific parts of the maze.
(47) For several nights after the rats’ maze exercises, their hippocampal neurons displayed similar firing patterns; the rats were apparently playing back their memories of running the maze. The major difference was that the firing was more rapid, as if the memories were being run

[填空题]When she returned home, she found the window open and something (steal) ______

[简答题]Most of us，when we reached our teens，started looking forward to the day when we would occupy places of our own，far from the confines of our families．We saw this moving away as a chance to strike out on our own，to grow，to spread out wings and experience freedom．At the same time，we regarded this independence as temporary-the thing to do until we found the perfect mate and married．Over the years，many millions of people have made this passage from one family to another，with just a brief，often nervous interval of independence in between．But recently，more and more people have begun to challenge the concept that living together is better than living alone．Being single is now accepted as an alternative lifestyle-one that is natural，rewarding，and complete．In fact，being single has become almost fashionable．

[单项选择]When we plan our vacation, mother often offers______suggestions.
[A] careful [B] practical [C] effective [D] acceptable

[填空题]When she returned home ,she found the door open and something(steal) ______.

[填空题]When we are trying to change our diet, we usually will be anxious because we are nervous about ______.

[填空题]When we hate our jobs, the trick is to ______.