2、yourletter,Iamverypleasedtoinformyouthatyourplansarequiteacceptabletous.AConcerningBConcernCRegardedDRegard正确答案是:A4、“We didn't see him at the exhibition yesterday.”“He()it.”Amustn't visitBcan't have visitedCshould have gone to seeDmay see正确答案是:C5、Heis________abouthischancesofwinningagol