1) We have studied English ……………… 11 o'clock. a) since b) for 2) She has collected them ……………… fifteen days. a) since b) for 3) John has worked in this office ……………… 2020. a) since b) for 4) He has lived here ……………… many years. a) since b) for 5) They have collected them ...................... a long time. a) since b) for 6) My brother has collected them ...................... July. a) since b) for

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