单项选择题
To study a foreign language,（）
A.a good dictionary should be boughtB.buying a good dictionary is necessaryC.you should buy a good dictionaryD.it is necessary that you will buy a good dictionary
单项选择题 He thoroughly understood the society（）
单项选择题 As you like popmusic，（）I like literature.
单项选择题 I bought this eighteenth century writing desk at a quite（）price.
