【单选题】Which type is not correct for corrugated carton packing?
A.
Fourth wall corrugated
B.
Triple wall corrugated
C.
Double wall corrugated
D.
Single wall corrugated
【单选题】_____ are good friends. [ ]
【单选题】________ like American fried chicken. [ ]
【单选题】All but______to have an excursion.
【单选题】I think he is a student, ______? [ ]
【单选题】______ are good friends. [ ]