Complete the following sentences with appropriate words or phrases. 1 ) Nowadays we r____ more and more ____ computers to help us in doing everything. 2) Can you turn the music down, please? I can't c_____ _____ my work. 3) You ____ b_____ _____ fail the exam if you don't do any revision(复习). 4) The boat t____ _____ ,throwing the boy into the water. 5) I'll c____ you by telephone when I hear anything new. 6) I___ ___ ___ all the efforts they did not succeed. 7) It is true that these herbs (药草)can be used to r_____ pain. 8) They are making further efforts to d_____ the cost of production. 9) We couldn't hear what they were saying on the tape-----there was too much b______ noise. 10) I hadn't seen him for 16 years, but I r_____ him immediately.