Some teachers argue that students who ____________ using a calculator may forget how to do mental calculation.
The phrase "keeps sellers on their toes" in the passage mostly means "______".
According to critics of globalization, several developed countries have become rich because of
__________ John Kennedy was elected president, he was the youngest American President ever.
Only one of our gifted students______to participate in the final competition.
It is stated in the passage that____________________ .
As a millionaire who liked to show off her wealth, Mrs. Smith paid______________________________________________ we asked.
He_______________us but he was short of money at the time.
Education in many countries is compulsory________the age of 16.
There has been a great increase in retail sales,_____________________ ?
_______ has been a topic of continual geological research.