1. _______________（青少年犯罪的主要原因是由于）that social environment is becoming worse.
2. The workmen think _______________（遵守安全规则很重要）.
3. The new government was accused _____________（未实现其降低失业率的承诺）.
4. Only with combined efforts，________________（我们才能期望台湾不久有新的面貌）.
5. Several thousands of quake-smitten inhabitants ________________（得到了政府充分的救济）.