Verified answer

1 disappointed 2 unfriendly 3 underestimate/ overestimate 4 bilingual 5cooperation 6 international 7 disqualified - unfair 8 rebuilding 9 resit 10 unacceptable-  renew 11 informal 12 overconfident -irresponsible 13 co-workers 14 misunderstood 15 overslept 16 bilateral  17 disinfected 18 uncomfortable 19  bicentenary 20 illegible