7. If Benjamin Franklin (not / work) so hard, he (not/become) the symbol of America. A didn't work B wouldn't have worked C hadn't worked D wouldn't have become E hadn't become F wouldn't become

C) hadn't worked и D) wouldn't have become Пояснение: Это условное предложение третьего типа, говорящее о ситуации в прошлом, которая не произошла. Структура: If + Past Perfect, would have + Past Participle. Если бы Бенджамин Франклин не работал так усердно, он бы не стал символом Америки.