11. Many people like white color as it is a ________ of purity.

A) symbol B) sign C) signal D) symptom

12. This research has attracted wide ________ coverage and has featured on BBC television‘s Tomorrow’s World.

A) message B) information C) media D) data

13. I would never have ________ a court of law if I hadn‘t been so desperate.

A) sought for B) accounted for C) turned up D) resorted to

14. The energy ________ by the chain reaction is transformed into heat.

A) transferred B) released C) delivered D) conveyed

15. During the process， great care has to be taken to protect the ________ silk from damage.

A) sensitive B) tender C) delicate D) sensible

11-15 ACDBC