When you are on business, you should carry a cell phone__will help you contact your colleagues and relatives.

A. what  B. which  C. it  D. who

 I sent my closest friend a postcard__ shows a glorious sunset in Love Valley, Dalat

A. where  B. what  C. it  D. that

The earthquake in Kobe in 1995 caused___ damage

A. severe  B. severely  C. more severe  D. most severe