Annie， you look sad． What's eating you？
I lost my wallet this afternoon． Terrible!（ ）
| A． |
What are you eating |
| B． |
What's your favorite food |
| C． |
Who's eating you |
| D． |
What's wrong with you |
Diana used to _________ to work， but now she is used to ________ because the road is crowded and she wants to keep fit．（ ）
A．drive； walkB．drive； walking
C．driving； walk
I found ________difficult for me to finish the work on time．（ ）
A．thatB．itC．this
You can surf the Internet _________ you want to know more about the 2020 World Middle School Games．（ ）
A．ifB．althoughC．until
_________beautiful city!
Yes． Tourists from all over the world come to visit it every year．（ ）
A．HowB．WhatC．What a
Must we clean the classroom at once？
No， you ________． You may clean it after school．（ ）
A．mustn'tB．needn'tC．can't