In the sentence 'When you're driving, concentrate __ the road!', which preposition completes it?

• A. on
• B. in
• C. at
• D. to

Answer: (A)

Directing your mental energy toward something is what this item is testing. In this driving instruction, you’re telling someone to keep their attention aimed at the road. The natural collocation is concentrate on, which means to focus your mind on that object or task. So the completed sentence sounds natural as “When you’re driving, concentrate on the road!”

The other prepositions don’t fit the idea of focusing attention: in would imply being inside something, which isn’t appropriate here; at points to a location rather than the thing you’re focusing on; to isn’t used with concentrate in this sense and would feel incorrect.