问题
选择题
—How about the walls?
—The walls are_________ thick.
A.three-inch
B.three inches
C.three-inches
D.three inch
答案
B
three inches thick作表语。
—How about the walls?
—The walls are_________ thick.
A.three-inch
B.three inches
C.three-inches
D.three inch
B
three inches thick作表语。