—What're they?
—They're ________. [ ]
A. bus
B. a boxes
C. boxes
D. a map
答案：C
Betty is a beautiful girl ________ bright eyes and black hair.
A．in
B．has
C．with
D．have
装配是焊接的前道工序，装配质量的好坏直接影响到焊接的质量。( )
