There is useful book and interesting magazine on the desk. They are my brother’s.
A. a, an, all
B. a, a, both
C. a, an, both
D. an, a ,all
网友回答
A. a, an, all
B. a, a, both
(答案→)C. a, an, both
D. an, a ,all
解析：
useful中的首字母u发的是/ju/非元音，故用a；而interesting中首字母i发的是/?/为元音，故用an；这里只有两本书，故用both，而all用于三者及以上，故选C。