题目内容
As students, we should work hard and do ________ best to realize our dreams.
A. us B. our 
C. ours D. ourselves
B
【解析】
试题分析：句意：作为学生，我们应该努力学习，尽力去实现我们的梦想。do one’s best(尽力)，是一个词组，这里的one’s表示所有格，所以本题选B。
考点：考查代词。
A. crying B. laughing C. shoes D. all the time E. asleep |
When I was ten, my mother worked all day, so I had to take care of my younger sister. At that time, my little sister was about four years old and she missed mum 1. .
One day, after I had given her dinner, she started 2. for mum. She was so young and really needed mum. So I dressed her up, put on her 3. , carried her on my back and walked out. Soon she fell 4. .
About half an hour later, I found that she had lost a shoe while sleeping. I took her off my back and put her down.