第二十次全国公安会议明确指出，当前和今后一个时期，公安机关在新世纪、新阶段担负着( )的重大政治和社会责任。

A．巩固 * * 党执政地位

B．保卫社会主义成果

C．维护国家长治久安

D．保障人民安居乐业

用所给词的适当形式填空。

1.  We need _____ (wear) warm clothes in winter.

2.  There_____ (be)a little water in the glass.

3.  Who is the _____ (good) in English in your class?

4.  Jim is now' much _____ (happy) than he was one year ago.

5.  The students are very_____ (busy) now. They_____ (have) an exam next week.