An a_ _ _ _ _ _ _ started the fire at the shopping centre
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An arsonist started the fire at the shopping centre

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Aren’t you about to finish with the dishes? you (have been washing) the dishes for thirty minutes or more. how long can it take you to wash the dishes? we have been/gone to the steak house restaurant many times. the food is excellent. a: what is that sound? b: a car alarm (is ringing) somewhere down the street. it (drives) me crazy —i wish it would stop! it (has been ringing) for more than twenty minutes. can you translate this note from stockholm? i understood swedish when i (was) a child, but i (have forgotten) it all. what’s that dent in the side of the car? have you (had) an accident? i’m sorry, john’s not here; he (has gone) to the dentist. he (has been  having) trouble with a tooth for some time. this cassette recorder is broken. have you (been playing) about with it? your italian is very good. have you (studied) it long? do you mind if i clear the table? have you (had) enough to eat? ann has never (gone) camping. she (has not slept) in a tent. frank, where have you been? we (have been waiting) for you since 1 p.m. i’m not surprised he (has failed) that exam. he (has not been working) hard recently.