Last week, Vivian a dress for her mother with her first-month salary.
A：buy
B：bought
C：will buy
D：would buy
下列物质中属于纯净物的是（ ）
根据《望洞庭》填空。
《望洞庭》中，诗人以“望”为观察点，描写了____、____相互辉映的景色，表现了诗人____之情。
