问题
We work together to achieve our common purpose： ________ world that is safer, cleaner and healthier than ________ one we are living in.
A:the ； /
B:a ； /
C:the ； the
D:a ； the;
B:a ； /
C:the ； the
D:a ； the;
正确答案是：
同类题型
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