Complete the following sentences with an appropriate word or phrase. 1) Young as she is, Mary is very good at h_____ difficult customers. 2) After explaining his plan in great detail, Bob s_____ its main points in a few sentences. 3) Many of the students c______ that the exam was too hard. 4) Nowadays we r____ more and more ____ computers to help us in doing everything. 5) Can you turn the music down, please? I can't c_____ _____ my work.