【推荐1】Over the years, the system developed into different forms, as it was a time when people were divided geographically, ________ (lead) to many varieties of dialects and characters. (所给词的适当形式填空)

【推荐2】The Government’s present course will only lead ________ disaster.(用适当的词填空)

【推荐3】Experts warn that medical waste from hospitals, if not handled properly, may lead ________ spreading diseases. （用适当的词填空）

【推荐1】Has your monitor lived up ________ his promise that he would have made it to Peking University? (用适当的词填空)

【推荐2】I’m sorry I stopped you. Please proceed ________ your work. (用适当的词填空)

【推荐3】He studied hard and ________ last he had a chance to go abroad. (用适当的词填空)