One day a pig went to the stable（馬棚）to __41__ a good friend, an old horse, and was going to ___42__ there for the night . Night came and it was time___43___ sleep. The pig went into the straw heap(稻草堆) and lay comfortably（舒服地）. A long time __44__, but the horse was still___45___ there and did not move. So the pig asked the horse ___46____ he did not go to sleep. “Standing like this is the beginning of sleeping.” answered the ____47____.The pig found it __48___ to believe(相信) and said, “How can you stand there sleeping? It is not comfortable at all.” The horse answered, “Comfort is your habit(習性).___49____ horses, we have the habit of running quickly. So we are always ready to run quickly even if(即使) we are __50___.

1.A. look        B. see          C. watch            D. look at

2.A. left         B. sit           C. lay               D. stay

3. A. by           B. on           C. to                 D. with

4.A. passed      B. pass        C. past              D. was passed

5.A. standing    B. stands      C. sitting           D. lying

6.A. what         B. why         C. when             D. which

7.A. animals     B. pig          C. horse            D. heap

8. A. hardly       B. easily      C. difficult         D. easy

9.A. While        B. For         C. As                 D. Like

10.A. sleep        B. asleep      C. slept              D. to sleep