There is nobody here in the office, they________have all gone home.
A、can
B、must
C、should
D、would
The next morning people found the world outside their houses completely________ .
A、change
B、changing
C、changed
D、to change
P: No, not very serious, but the doctor told me to stay in bed and have a good rest. S: I see. I’ll _____55_____ as soon as he came back. P: Thank you. Goodbye! S: Bye!