Population growth rates vary among regions and even among countries within the same region.
vary = làm cho biến đổi
A. kiềm chế
B. không thay đổi
C. vẫn không ổn định
D. biến động
As a millionaire who liked to show off her wealth, Mrs. Smith paid______________________________________________ we asked.
Supporters of free-market globalization point out that_____________________ .
It is stated in the passage that____________________ .
The Lake District,____________________ was made a national park in 1951, attracts a large number of tourists every year.
__________ John Kennedy was elected president, he was the youngest American President ever.
The packages___________________ so that it would be easier to carry them.
Standing on the tip of the cape,____________________ .
Only one of our gifted students______to participate in the final competition.
_______ has been a topic of continual geological research.
The pool should not be made so deep______small children can be safe there.