This is Jim. He is thirteen. He is from the U.S.A. He is a student. He has a good friend. His name is Jack. Jack is fifteen. He is from Canada. Jack is tall, but Jim is short. They are in the same school, but they are in different grades. Jim is in Class Two. Jack is in Class Two, too. They go to school（上学）at seven in the morning and go home（回家）at six in the afternoon.
根据短文内容，选择正确答案。
Jim and Jack are ______.
A. brothers  B. friends   C. teacher and student   D. from the U.S. A.
Jim and Jack are in _____.

A．the same grade

B．different grades

C．the same color

D．the same class

Jack is in _____.

A．Class 4

B．Class 3

C．Class 2

D．Class 1

They go to school at ______ in the morning. 

A．6:00

B．7:00

C．7:30

D．8:00

Jim is ______.

A．short

B．tall

C．strong

D．Big