and的平行结构,可以排除ABC
D remain this way就表示维持这个样子,remain in this way 是wordy,因为 remain this way === do in this way.
* I wake up every morning on 5:00 am, she has been remaining this way for three months.
* I wake up every moring on 5:00 am, she has been doing in this way for three months.
THUS can refer to certain things depending on the situation. 'Thus' can refer to some process that is stated earlier in some cases or it can refer to the 'state' that is mentioned in the statement.
B选项:it 指代不明确
C选项:being relatively isolated from world trade at the time应该是用来修饰Japan's isolation,而此选项中它用来修饰 the prolonged peace。
D选项:用 at the time,而且后面加of ... 就不要使用during,此种情况就只使用during...
E选项:then 在 world trade厚 很尴尬,应为during the Tokugawa shogunate已经给出具体的时间段了;同时its指代不清晰。
注意平行关系