填空题
● Look at the notes below.
● Some information is missing.
● You will hear a telephone conversation about office shelving system.
● For each question 16-22, fill in the missing information in the numbered space using one or two words.
● After you have listened once, replay the recording.

Dimensions	Width　　　　　　　　　3.5 m Height　　　　　　　　(16)... Depth　　　　　　　　 (17)...
Delivery:	Cost　　　　　　　　　 No charge Time　　　　　　　　　(18)... weeks
P rice:	Unit price　　　　　　(19)... Discount price　　　　￡930 for (20)... units
Guarantee period	(21)... year
Average life	At least (22)... years