【单选题】
12. ____ you return the dictionary to the library immediately, you will be fined.
【单选题】
People at the party worried about him, because no one was aware____ he had gone.
【单选题】
It was____ then that I realized the importance of a good mastery of the language.
【单选题】
A meeting of the society will be ____ at six o’clock on Tuesday evening.
【单选题】
I pulled the handle ____ I could.
【单选题】
She seems to be too short for a____.
【单选题】
He can come any day ____ Friday.
【单选题】
I seem to have met you ____.
【单选题】
Mary regretted not ____ to John’s birthday party last Sunday.
【单选题】
26. We regret to inform you that the materials you ordered are out of____ .