On June 30, 1992, international timekeepers in Paris were added an extra second to the day.
The word "allocated" in the passage mostly means "______".
The packages___________________ so that it would be easier to carry them.
There has been a great increase in retail sales,_____________________ ?
It is stated in the passage that____________________ .
The phrase "keeps sellers on their toes" in the passage mostly means "______".
Supporters of free-market globalization point out that_____________________ .
The examination was not very difficult, but it was_____________________ long.
Only one of our gifted students______to participate in the final competition.
Education in many countries is compulsory________the age of 16.
__________ John Kennedy was elected president, he was the youngest American President ever.