The length of an X - ray wave is incredibly small: less than one ten- millionth of a millimeter.
As a millionaire who liked to show off her wealth, Mrs. Smith paid______________________________________________ we asked.
She asked me______I was looking at.
______ his brother, Mike is active and friendly.
I am sorry I have no time at present to____________________ detail of our plan.
The phrase "keeps sellers on their toes" in the passage mostly means "______".
__________ John Kennedy was elected president, he was the youngest American President ever.
Stephanie: "Oh, no! I left my book at home. Can I share yours?" Scott: "______ "
He_______________us but he was short of money at the time.
Education in many countries is compulsory________the age of 16.
Standing on the tip of the cape,____________________ .