Dear Mom,
We had a nice time in the park last week, Mom, but you left the day before yesterday. Where did you? What happened to you?
When we were together, we went shopping, flew kites, went swimming … You bought me a T-shirt in a store. You helped me with my homework. And you made sandwiches for me. We also slept together every night. You never said you would leave me. I began to look for you when I found you left, but I failed.
Mom, thank you for teaching me so much. I hope to see you again. It’s time for bed. I miss you!
Yours,
Jim
小题1:When did the writer’s mother leave?
A．Yesterday
B．Last week
C．The day before yesterday
D．Last year小题2:Before the writer’s mother left, they did not __________.
A．go shopping
B．go to the zoo
C．go to the park
D．fly kites小题3:The writer’s mother made _________ for him.
A．kites
B．T-shirts
C．sandwiches
D．cakes小题4:The writer wrote the letter __________.
A．in the morning
B．after class
C．in the afternoon
D．before going to bed小题5:From the passage we know __________.
A．the writer’s family is poor
B．the writer’s father is ill
C．the writer’s father died
D．the writer felt happy when he lived with his mother
小题1:C
小题2:B
小题3:C
小题4:D
小题5:D
题目分析：短文大意：这是一份写给母亲的信。作者旨在通过该信感谢母亲给他带来的快乐，表达作者对母亲的想念之情。
小题1:细节理解题。根据正文第一段首句We had a nice time in the park last week, Mom, but you left the day before yesterday.可知选C。
小题2:细节理解题。根据正文第二段首句When we were together, we went shopping, flew kites, went swimming …可知选B。
小题3:细节理解题。根据第二段中And you made sandwiches for me.可知选C。
小题4:细节理解题。根据信末Mom, thank you for teaching me so much. I hope to see you again. It’s time for bed.可知选D。
小题5:细节理解题。根据短文内容知作者感到和母亲在一起生活很快乐，所以选D。
式中，t为时间，v0、g为常数。点的运动轨迹应为：（）