Both inventors and engineers look for ways to improve things in areas like health, food, safety,transportation, aerospace, electronics,_________, and the environment

A. communication

B. communicative

C. communicator

D. communicating

The teacher gave some                                       on how to prepare for the test. 

A. consequences

B. effects

C. suggestions

D. ways

With only two days of____________negotiating time left, hope of progress was quickly evaporating at the climate talks.

A. official

B. office

C. officially

D. officious