单项选择
1. To prevent school violence, it’s essential to keep ____ eye on children who are not behaving up to the mark or those whose activities are provoking by _____ nature.
A. an, / B. the, the C. an, the D. /, /
2. The group of people aged 65 and older accounting for over 17 percent of Florida’s population, compared with the national average 12.7 percent, _______, Florida is known as the oldest place in the USA.
A. so not surprisingly B. it is not surprising C. not surprisingly D. surprisingly
3. DNA testing on shark fin soup conducted recently, traditionally served at large gatherings in parts of East Asia, ______ eight shark species, some of them _______.
A. identifies, endangered B. identifying, endangering
C. identifying, endangered D. identified, endangering
