中国石油大学 / 中石油
正确率:100%
11. This is one of the oldest buildings in town, ___________.
A、if not the best
B、if not better
C、if it is the best
D、if it is the better
A、if not the best
B、if not better
C、if it is the best
D、if it is the better
参考答案:
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