---I want to buy the book Harry Potter. Do you know its _______? --- Not very well. Maybe fifty yuan. 
#28259
A
cover
B
size
C
color
D
price
推荐题目
— What are the _______ doing there?— They are busy _______ their science experiment.
#29439
A
Boys students; to do
B
Boy students; to do
C
Boys students; doing
D
Boy students; doing
Bob is ___________brother.
#28172
A
Lucy’s and Lily
B
Lucy’s and Lily’s
C
Lucy and Lily
D
Lucy and Lily’s