Choose a proper preposition/particle:

Grenne points ... that the increase in life 

What does the phrase in bold mean?

It is difficult to

What does the word in bold mean?

They are offering merely

technical assistance.

Parks ........ a challenge to

Kahn’s

The discovery

could ....... light on

aging and cancer development in humans, too.

And although ........ various facets of this topic before, a holistic, wide-angle view of the problem

proved most appropriate for accurate

Once installed on your computer, these programs can seriously ... your privacy and your computer's security.

A ...... students

volunteer each year for environmental projects.

What does the word in bold mean? Use a consistent method to collate your results, and include both accepted and rejected items.

Such questions are

s