What people be able to protect if they are environment-educated? a) would b) will c) should. какой здесь вставить предлог и почему?

will 

потому что остальные не подходят и даже если поставить  они будут звучать неправильно по   смыслу 

what will      people be able to protect if they are environment-educated?         что люди будут способны защитить если они будут хорошо осведомлены 9образованы)  по охране окруж. среды?

would- выражает сомнение или в прошлом, а у нас настоящее время во  2 части предложения

should- следовало бы, по- моему не подходит по смыслу- предложение звучит коряво

Recently, i went to london for three days. on the first day made ​​me a success, i just arrived and were settled in the hotel. the next day i visited many attractions: the botanical garden, big ben i also visited scotland and wales. the third day was so sad i had to leave england. hopefully i'll be able to visit her again. недавно, я ездила в лондон на три дня. в первый день не произвел на меня фуррор, я только прилетела и заселилась в гостиницу. на следующий день я посетила много достопримечательностей: ботанический сад, биг также я посетила шотландию и уэльс. третий день был таким печальным, мне пришлось покинуть . надеюсь, я скоро снова смогу посетить ее  

Denis told me not to come to him in the eveningshe asked me if he had read the novel.i assured them that everything would be all right.nina asked for coffee.he thought he would do it by all means.she asked me what i was doing at that moment.olga answered that her parents had just returned from a business trip.nina asked me to put that book on the shelf.the teacher told the children to open their books and read exersise number 3.lena said she would be translating an article at three o'clock the next day.polina said she had had that doll since the previous year.