(2013·天津，9)No one ________ be more generous; he has a heart of gold.
| A．could | B．must |
| C．dare | D．need |
Giving up my job to go back to full-time education was a big __________, but now I know it was the best decision I ever made.
| A．project | B．commitment | C．competition | D．ambition |
The new tax would force companies to __________energy-saving measures.
| A．adapt | B．adopt | C．adjust | D．address |
But for water，it ______ possible to live in the desert．
| A．is | B．was | C．were | D．wouldn't be |
I like __________in the early morning when the air is fresh and I can take a walk around the garden.
| A．that | B．it | C．which | D．what |
Would you _________ her novels as serious literature or mere entertainment?
| A．classify | B．distinguish | C．mistake | D．remark |