294. It can be difficult………….. to talk to teenagers nowadays.

A. to parents                         B. with parents          C. for parents D. of parents

295. Letters were a common___________ of communication prior to the electronic age.

A. skill                                   B. means                    C. channel                 D. System

296.                I was so tired, I walked all the way home.

A. Even      B. Despite                      C. Because                   D. Although

297. Mexico City,                is the capital of Mexico, is a cosmopolitan city.

A. where        B. that            C. which          D. what

298. He’s so brilliant and he can do anything -              .

A. the sky’s the limit             B. once in a blue moon     

C. out of this world                D. it’s over the moon

299. Reading is the best way to                 your vocabulary in any language.

A. increase                B. improve               C. raise D. put up

300. Dogs have a keen sense of                 .

A. flowers            B. ability            C. smell            D. food