The agency helps people find childcare, including putting families in touch with baysitters for______.

A new ______ to teaching languages is being used here, and it has turned out to be very helpful to the students.

The invention of the typewriter was a great_______  to communication and printing.

Don’t make ______ of her. Can’t you see she is in ______?

In rencent years, China and the USA have been a lot of_____of views about the same problem.