1) She ___ (study) for hours before the exam started. a) had been studying b) has been studying c) had studied 2) They ___ (wait) for over an hour before the bus finally arrived. a) had waited b) have been waiting c) had been waiting 3) He ___ (train) for the marathon all year before it was canceled. a) was training b) had been training c) has trained 4) By the time we arrived, they ___ (play) soccer for two hours.a) had waited a) have been playing b) had been playing c) had played 5) Sarah ___ (plan) her wedding for months before she chose the venue.b) have been waiting a) had been planning b) has been planning c) had planned 6) I ___ (look) for my keys all morning before I found them in my bag.c) had been waiting a) had looked b) have been looking c) had been looking 7) You ___ (work) on that project for days before you finally finished it. a) had been working b) was working c) c) have worked 8) They ___ (argue) about the issue for a week before they reached an agreement. a) a) were arguing b) b) had been arguing c) c) have argued 9) We ___ (think) about adopting a pet before we found the perfect dog. a) a) had been thinking b) b) have been thinking c) c) were thinking 10) He ___ (practice) guitar every day before he performed on stage. a) was practicing b) had been practicing c) has practiced

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