1 . 我写信告知你一些基本的餐桌礼仪。基于中国的传统风俗，你应该先让长者用餐。（应用文之告知信）
I am writing to inform you of ________________. ________________, you should let the elderly eat first.

5 . Chinese medicine might be slowly in curing the patient of the disease, but it has less serious side effects even if ________ (take) frequently, for each medicinal herb is prescribed (开处方) for the benefit of the patient, causing no harm to the liver or the kidneys. (所给词的适当形式填空)

8 . From the late 13th until 19th century, with the highest section built and the overall length ________ (shorten), the Canal was turned into a main passage between northern and southern China as well as the economic lifeline of the country. （所给词的适当形式填空）

9 . Since the summer of 2022, a 26-year-old Shanghai resident ______ (name) Chen Jiaorong has been walking along Julu Road in Shanghai’s downtown area once or twice a week, looking around and picking up “garbage”. (所给词的适当形式填空)