1) I have listened to the radio for / since 30 minutes. a) for b) since 2) The boy has practiced the piano for / since an hour. a) for b) since 3) You have studied for this test for / since early this morning. a) for b) since 4) Our new neighbors have lived here for / since two months.  a) for b) since 5) The government has planned better roads for / since 2010.  a) for b) since 6) The puppy has played with the shoe for / since hours.  a) for b) since 7) My father has traveled to the Dead Sea for / since years.  a) for b) since 8) We haven't visited Mexico for / since 1990.  a) for b) since 9) He has worked at the same job for / since 20 years.  a) for b) since 10) It hasn't rained here for / since last winter.  a) for b) since

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