阅读短文，选择正确答案。

      I get up at 6: 50 every morning. Then I put on my clothes and shoes. And I eat my breakfast at 7: 20. I

have milk, apple and bread for my breakfast. I go to school by bus. I arrive at school at 8: 00. Then I have

my lesson at 8: 20. I go home at 5: 30 after school.

1. I _____________ at 6: 50 every morning.

A. get work

B. get up

C. wake up

2. My breakfast is at _____________.

A. 7: 20

B. 7: 30

C. 7: 00

3. I go to school _____________.

A. by bike

B. by train

C. by bus

4. I _____________ school at 8: 00.

A. arrive at

B. arrive in

C. arrive

5. I _____________ at 5: 30.

A. go home

B. play

C. sleep

原子核外第三电子层与第一电子层的电子数相等的原子，其质子数为[ ]

A．20

B．14

C．12

D．10