______ is of great importance now , my teacher often reminds me ,is study.
| A.It | B. As | C.What | D.Which | 
When the policeman stopped us, we all looked questioningly at him, ________.
| A.nervously and puzzled | B.nervous and puzzling | 
| C.nervous and puzzled | D.nervously and puzzling | 
I started as ________ office clerk, and turned ________ department manager three years later.
| A.the; the | B.an; a | 
| C.an; / | D.the; / | 
Each of the 400 people received from their boss ________ gift—“Who moved my cheese?”, ________ bestseller in the US, which helped them understand how to deal with changes in their lives and work.
| A.the; / | B.a; / | C.a; a | D.the; a | 
I found that she was unhappy and didn't say ________ word all ________ way home.
| A.a; the | B./; / | C.a; / | D./; the | 
Nowadays some hospitals refer to patients ________ name, not case number.
| A.of | B.as | C.by | D.with |