_______ that he might lose his job, Peter always works extra hours to please his boss.
| A．Worrying | B．Having worried | C．Having been worried | D．Worried |
Tim’s brown hair, dark glasses and the manner of walking alarmed the guards. That’s why he ______ closely.
| A．has watched | B．was watched | C．had watched | D．was watching |
Mo Yan’s Nobel Prize is likely to make the world go ______ about Chinese literature.
| A．nervous | B．serious | C．formal | D．wild |
The product in this shop is less expensive, but there is no ______ of quality.
| A．guarantee | B．symbol | C．matter | D．need |
Americans fill up their cars with gas ______ petrol.
| A．without | B．instead of | C． except | D．next to |
The 2004 Paralympics in Athens were ______ great success for China, which was the leader in ______ total of medals.
| A．the; a | B．a; 不填 | C．the; 不填 | D．a; the |