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The phrase "keeps sellers on their toes" in the passage mostly means "______".
Standing on the tip of the cape,____________________ .
Michael looked deeply hurt and surprised when_____________________ .
I am sorry I have no time at present to____________________ detail of our plan.
_______ has been a topic of continual geological research.
The word "allocated" in the passage mostly means "______".
There has been a great increase in retail sales,_____________________ ?
He_______________us but he was short of money at the time.
We must push the piano to the corner of the hall to_____________________ our party tonight.
It is stated in the passage that____________________ .