28. You can’t complain of being lonely____you don’t make any effort to communicate with others.
| A．when | B．until | C．unless | D．Once |
The study surveyed 500 families and found the mainproblem people suffered was tiredness, followed by loneliness and anxiety.
| A．domestic | B．public | C．psychological | D．biological |
Although the country has had political independence for over a century,it needs the support of its neighbors.
| A．naturally | B．economically | C．especially | D．luckily |
If your race car isn’t insured, you maylosing everything when it hits something solid．
| A．delay | B．deny | C．avoid | D．risk |
AIDS control and prevention is ato China as well as the whole world．
| A．surprise | B．challenge | C．reaction | D．threat |
tomorrow, our ship will set sail for Macao.
| A．However the weather is like | B．However is the weather like |
| C．Whatever is the weather like | D．Whatever the weather is like |