—He has got ________ idea. He lets his sister go with him.
—That's ________ good idea. [ ]
A. a; an
B. a; a
C. an; a
D. an; an
答案:C
—He has got ________ idea. He lets his sister go with him.
—That's ________ good idea. [ ]
A. a; an
B. a; a
C. an; a
D. an; an
答案:C