Learning means acquiring knowledge or developing the ability to perform new _______.

A number of scientists around the world are now investigating a phenomenon called synaesthesia that may affect as (26) _______ as one in 2,000 people

The last time I met him was 5 years ago.

What is the best title of the passage?

Using renewable energy sources is a sustainable way to ________ carbon emissions.

Although a deal has been agreed, it is not yet ________.

The professor's lecture on quantum physics was disrupted by the continual interruptions

A                      B

from the rowdy students, which made it difficult for the other attendees to fully comprehend the 

        C             D

complex concepts.