Open the brackets and use the Future Perfect Continuous Tense. 1. They already (rehearse) for an hour when we come. 2.1 (work) in this company for 10 years next April. 3. By next year he (writing) the novel for three years. 4. The thieves are sure that they (drive) for 6 hours when the police discover the robbery in the morning. 5. They (study) for 3 hours when you come.