1) the time a) at b) by c) in d) of 2) …fault a) at b) by c) on d) in 3) ….doubt a) at b) in c) under d) of 4) ….trouble a) at b) in c) of d) by 5) …the moment a) at b) in c) during d) on 6) ….vain a) at b) on c) in d) by 7) ….stake a) at b) on c) for d) duing 8) …common a) in b) at c) on d) duing 9) …chance a) at b) by c) in d) for 10) …control a) at b) under c) by d) in 11) …accident a) at b) by c) for d) under 12) ..the one hand a) at b) on c) under d) in 13) …mistake a) on b) at c) by d) for 14) ..now a) for b) by c) on d) of 15) ..the whole a) under b) at c) on d) by

solution upper 2E

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