一What does the sign over there read?一“No person ______ smoke or carry a lighted cigarette, cigar or pipe in this area.”

I didn’t see your sister at the meeting. If she __________, she would have met my brother.

.—She must have gone back to the valley. —No, she_________. The entrance to it was nowhere to be found. 

Without your help，I         the job on time last week．

The young man says that he will leave the company if he ______ for this.