1) Jonathan_______ (work) on his invention for three hours before he finally goes to bed. a) will have worked b) will have been working c) will be working 2) Jack _________ (work) at the post office for 20 years by the time he's 50. a) will have been working b) will have worked c) will work 3) I'm afraid Jack_____________(not/recover) from the accident by the time his football training begins. a) will not have recovering b) will not recover c) will not have recovered 4) I______________ (grow) my own vegetables for 2 years by the end of the year. a) will have been growing b) will have grown c) will grown 5) __________(you/ mail) the invitations before Friday? a) Will you mail b) Will you have mailed c) Will you have mail 6) We __________ (convert) the rooftop of our apartment into a garden by the end of the week. a) will have been converting b) will converted c) will have converted 7) Scientists hope they _________ (solve) the world's food shortage problem by the end of the century. a) will have solved b) will have been solving c) will solve 8) By June, Mr. Patterson__________(teach) music at school for ten years. a) will teach b) will have been teaching c) will have teach 9) By November, Harry ____________- (sell) his products to local stores for 2 years. a) will sell b) will have sold c) will have been selling 10) Are you sure you _________(clean) the living room before the guests arrive? a) will have cleaned b) will have been cleaning c) will clean

Future perfect simple or continuous?

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