We have made ____ clear that the goods should be packed in cartons. it 。 them 。 this 。 which。
We shall advise you ____ we are able to supply the goods again. as 。 while 。 as soon as 。 until。
We are in receipt of your letter dated Jan 8, ____ we are pleased to learn that you want to order 100 tons of the subject goods. in which 。 from which 。 to which 。 at which。
工业管道按介质划分应视为主要分项工程的有（）。 压缩空气管道 。 煤气管道 。 冷凝水管道 。 天然气管道 。 氧气管道 。
入侵报警探测器的安装位置和安装高度应根据（）。 产品特性 。 警戒范围 。 环境影响 。 尺寸大小 。 支架底座 。
As the goods ____ within the scope of our business activities, please contact us immediately.
