30 : 1. the engineers … the engine from 5 till 7 tomorrow. a) will test b) will have tested c) will be testing 2. we … things for two hours by 8 o’clock yesterday. a) packed b) had been packing c) were packing 3.his father … as an engineer since he was born. a) is working b) works c) has been working 4. you … it last week. i’m really disappointed with you. a) may have done b) can have done c) should have done 5. at that moment i … him. a) could have kill b) can kill c) could have killed !

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