April 1st, ... we play tricks on people, is known as April Fool's Day.

A. that  B. which  C. in which  D.when

Most companies prefer employees with English ability to ... with foreigners when necessary.

A. communication  B. communicative  C. communicate  D. communicator

English language ... me to gain further knowledge about all aspects of life.

A. enables  B. unable  C. ability  D. inability

Another benefit of learning English lies in exploring more subjects and ...

A. informed  B. informative  C. information  D. informing