Complete the following sentences with appropriate words or phrases. 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 ) The boy c____ his fear of the dark and walked alone in the woods at night. 5) He g____ ____ his seat on the bus to an old woman standing nearby. 6) Do you believe a 15-year-old girl has translated this English story into Chinese a____ ____ ____. 7) Sam believes that in a factory beautification of the dull setting r_____ ______ greater productivity. 8) Let's t_____ ______ the arrangement with the others before we make a decision. 9) When they i_____ her car at the garage, they discovered that the engine needed clearning. 10) They were busy a_____ a tractor (拖拉机)when the accident happened.