"It’s high time the children________ to bed.”
Tom: "___________________ " Mike: "I won't say no!"
Regular exercise and good diet will bring______fitness and health.
The examination was not very difficult, but it was_____________________ long.
I am sorry I have no time at present to____________________ detail of our plan.
Only one of our gifted students______to participate in the final competition.
She asked me______I was looking at.
There has been a great increase in retail sales,_____________________ ?
He_______________us but he was short of money at the time.
_______ has been a topic of continual geological research.
The phrase "keeps sellers on their toes" in the passage mostly means "______".