18. 根据短文理解，选择正确答案。
Bob works in an office. Every morning he has breakfast at seven thirty, reads his newspaper, drinks a cup of coffee and then goes to work. One morning, he is still at the table reading his newspaper at: 8 0'clock. He asks his wife for another cup of coffee. His wife asks him, “Aren't you going to the office today?” “The office?” He jumps up from his chair, "I think I am in the office."
（1） Bob is .
A . a bus driver
B . an office worker
C . a primary school teacher
D . a waiter
（2） Bob before he goes to work.
A . has breakfast
B . reads his newspaper
C . drinks a cup of coffee
D . A, B and C
（3） Bob today.
A . can go to work late
B . must go to work
C . doesn't go to work
D . should go to work early
（4） Bob this morning.
A . has a cup of coffee at home
B . has two cups of coffee at horn
C . has a cup of coffee in his office
D . has two cups of coffee in his office
（5） Bob thinks .
A . today is Sunday
B . he is in the office
C . he works very hard
D . he is at home
