By 2025, when the number of consumers worldwide has reached 4.2 billion, people with high income will be, for the first time, more than _______struggling to meet basic needs.
Nowadays, there is a ______ increase in children’s creativity, for they are greatly encouraged to develop their talents.
His teacher is the only one ______ he can turn when he is in trouble.
_____ of their bad habits, the boys switched from being dependent on their parents to _____ for others.
Happy birthday, Alice! So you have _____ twenty-one already.
The computer was used in teaching. As a result, not only _____, but students became more interested in the lessons.