8道SAT改进句子题目练习_SAT阅读

8道SAT改进句子题目练习

　　3. Some bat caves, like honeybee hives, have residents that take on different duties such as defending the entrance, acting as sentinels and to sound a warning at the approach of danger, and scouting outside the cave for new food and roosting sites.

　　 acting as sentinels and to sound

　　 acting as sentinels and sounding

　　 to act as sentinels and sound

　　 to act as sentinels and to sound

　　 to act as a sentinel sounding

　　4. The only way for growers to salvage frozen citrus is to process them quickly into juice concentrate before they rot when warmer weather returns.

　　 to process them quickly into juice concentrate before they rot when warmer weather returns

　　 if they are quickly processed into juice concentrate before warmer weather returns to rot them

　　 for them to be processed quickly into juice concentrate before the fruit rots when warmer weather returns

　　 if the fruit is quickly processed into juice concentrate before they rot when warmer weather returns

　　 to have it quickly processed into juice concentrate before warmer weather returns and rots the fruit

　　5. Carbon-14 dating reveals that the megalithic monuments in Brittany are nearly 2,000 years as old as any of their supposed Mediterranean predecessors.