---You’ve dropped _____ “o” in the word “understood”!

---Sorry, I forgot ___ letter “o” is doubled.

A. an; the B. a; the C. an; a

--Marry and Lisa, this is your classroom, right?

--- No. _____ is on the third floor.

A. Mine B. ours C. Hers

---What do you think of his______ ?

--- It’s great. If we follow it, we can finish the task in a short time.

A. question B. introduction C. suggestion

--- Cindy, you got home early today.

---Oh, we _____ have three classes in the afternoon, but today we had two.

A. usually B. seldom C. never

I can’t help you _____ you tell me what’s wrong.

A. because B. so C. unless

The police said that the accident happened _____ an early morning.

A. in B. on C. at

－There is serious pollution in our city these days.

－That’s right. ____ cars people drive, ____ pollution our city will have.

A. The fewer; the fewer B. The fewer; the more C. The more; the more

Sally, this is ___ time you’ve asked me about that matter. What’s wrong with you?

A. three B. the three C. the third

It’s time to start the meeting, but the boss _____ yet.

A. hasn’t arrived B. won’t arrive C. doesn’t arrive

It’s not _____ to learn a language well. You should put more effort into it.

A. early B. possible C. easy