You _______have a wrong number. There's no Mr Johnson here.
A. need B. would C. must D. can
I haven't gone back to my hometown _______I left it in 1993.
A. when B. since C. as D. till
－I'm too nervous to give a talk in front of so many people.
_______, Lucy. You can do it.
A. Come on B. That's great C. You're right D. That's true
No one wants you to be _______ but we really want you to do your best always.
A. proud B. perfect C. polite D. popular
－Could you please help me check what's wrong?
－Sorry, I don't have much _______of the computer.
A. introduction B. development C. knowledge D. information
－Why does the river smell terrible? －Because the water_______.
A. was polluted B. has been polluted C. will be polluted D. has polluted
