1. We had better _________________（天天锻炼身体）.
　　2. _______________（为了不影响他们）,we left quietly.
　　3. _____________（我答复她）that I would accept her invitation.
　　4. According to the newly-announced policy,we should ________________（努力搞活国有大中型企业）.
　　5. It has become an utmost urgency that ________________（必须清除政府中的贪污腐化现象）.

　　答案与解析：
　　1. take exercise everyday
　　2. Not to disturb them
　　3. I replied to her
　　4. invigorate the large and medium-sized state-owned enterprises
　　5. the administration must be cleaned of graft and corruption