There are times when the ____ on the road to success prevent our reaching our goals. ( 章节：2 难度：3)_做题室

单项选择题There are times when the ____ on the road to success prevent our reaching our goals. ( 章节：2 难度：3): A、barriers; B、blocks; C、boundaries; D、accidents

正确答案：A
答案解析：
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