We will allow you half of the invoiced amount for packing if you return the ( ) crates.
A. hollow B. vacuum C. empty D. vacant
Before shipment, the buyers generally send their ( ) to the sellers, informing them of the packing and mark, mode of transportation, etc.
A. Shipping documents B. Shipping requirements
C. Shipping advice D. Shipping marks
Much to our , we are unable to entertain your offer
(A) regretting (B) regret (C) regretted (D) rarely