Task 1. the following sentences with the words or phrases given below. competent, disappointment, perform, embark, encounter, rewarding,rewarding be resposible for, promote, combines, make an appointment, They s o many problems in their work. He should the accident. To his , he failed to pass the exam again. You need to to visit a doctor for a physical checkup. Mr. Smith is about to on a new business. The meeting discussed how to the latest product. This job is challenging but . He is very in his work. Hydrogen(氢气) with oxygen(氧气) to form water. A computer can many tasks at once.