1) they will have lived here for 25 years in may (live). 2) don`t phone me before nine. i`ll my homework until then. (do) 3) at six o`clock next wednesday i`ll first class to abu dhabi. (fly) 4) i hope i`ll all my work by friday evening. (finish) 5) i`ll be ok. scientists will a "cure" for old age by the time i`m 50. (discover) 6) have a great birthday tomorrow. i`ll of you. (think) 7) by the time the film finishes, you`ll asleep. (fall)

1) By May, they will have lived here for 25 years. (live)
To form the future perfect tense, we use the auxiliary verb "will" followed by "have" and the past participle of the main verb. In this sentence, the main verb is "live," and the past participle is "lived." So, the correct answer is "will have lived."

2) Don't phone me before nine. I'll have done my homework until then. (do)
To express an action that will be completed in the future before another action or time, we use the future perfect tense. In this sentence, the main verb is "do," and the past participle is "done." So, the correct answer is "I'll have done."

3) At six o'clock next Wednesday, I'll fly the first class to Abu Dhabi. (fly)
To indicate a future action at a specific time, we use the future simple tense. In this sentence, the main verb is "fly." So, the correct answer is "I'll fly."

4) I hope I'll have finished all my work by Friday evening. (finish)
To express a hope or expectation about a future completed action, we use the future perfect tense. In this sentence, the main verb is "finish" and the past participle is "finished." So, the correct answer is "I'll have finished."

5) I'll be ok. Scientists will have discovered a "cure" for old age by the time I'm 50. (discover)
To talk about an action that will be completed in the future before a specific time, we use the future perfect tense. In this sentence, the main verb is "discover" and the past participle is "discovered." So, the correct answer is "will have discovered."

6) Have a great birthday tomorrow. I'll think of you. (think)
To express an action that will happen in the future, we use the future simple tense. In this sentence, the main verb is "think." So, the correct answer is "I'll think."

7) By the time the film finishes, you'll have fallen asleep. (fall)
To indicate an action that will be completed in the future before another action or time, we use the future perfect tense. In this sentence, the main verb is "fall" and the past participle is "fallen." So, the correct answer is "you'll have fallen."