Excuse me. Where is your teachers’ office—________, sir.—Thanks a lot.

John ________ before he got word that the college he chose had accepted him. [ ]

Do you know _______________________ won high clickrate in micro-blogs—It was the teachers’ wonderful chorus in the NewYear’s gala.

Isn’t that Ann’s husband over there —No, it _______be him. I’m sure hedoesn’t wear glasses.

What do you think aboutEnglish —- It’s a difficultlanguage _____