1) I can't concentrate ____ my homework. a) for b) on 2) We need to concentrate our efforts ___ finding the solution. a) on b) in 3) We don't wish to impose ___ you. a) at b) on 4) I don't know how my parents might react ___ the news. a) to b) for 5) I need a moment to recover ____ the shock. a) of b) from 6) He will suffer ____ studying too little. a) with b) from 7) I cannot inflict pain ____ animals. a) on b) in 8) I've always struggled ___ math. a) in b) with 9) I started working ____ this project. a) in b) on 10) It is wonderful to work ___ myself. a) for b) from 11) You should apply yourself ___ learn a new language. a) to b) for 12) Mike applied ___ a scholarship. a) to b) for 13) You must apply the paint ___ the surface.  a) to b) at 14) I'm really bad ___ cooking. a) at b) in 15) Nobody is immune ___ this. a) to b) of 16) My activity is limited __ walking. a) at b) to 17) I'm qualified ___ this job. a) to b) for 18) I'm skillful ___ avoiding confrontation. a) on b) at 19) The land is not suitable ___ farming. a) for b) to 20) Carlos is terrible ___ singing. a) on b) at 21) I was capable __ speaking in public. a) of b) at 22) Sally is incapable ___ this. a) of b) at

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