单项选择题 If you agree to the proposal, we shall put ______ our concrete plan as to the technical data, quality standard, payment, etc．for your consideration.

单项选择题 Concerning the payment for the machines to be imported by us, we suggest that we make payment ______ three annual installments without interest.

单项选择题 The goods which do not pass through the territory by land but call for a change of the means of transport at a place with a Customs establishment is defined as ______.