People should make giant panda reserves bigger ____.
A. protect them
B. to protect them
C. hunt them easily
D. to kill them easily
【答案】B
【解析】句意：人们应该使大熊猫自然保护区更大来保护它们。用不定式作宾补； to protect them保护它们；to kill them easily容易杀死它们；故选B
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