This morning I have _______ art lesson. Art is _______ useful subject. 
#33421
A
a; a
B
an; an
C
a; an
D
an; a
推荐题目
--- What’s this?--- It’s             .
#33785
A
an ID card
B
a orange
C
ruler
D
an UFO
Perhaps we will live in _________ dome on Mars.
#32718
A
a 8-bedrooms
B
an 8-bedrooms
C
a 8-bedroom
D
an 8-bedroom