【正确答案】 B

【答案解析】逻辑关系。句中的only too glad to的意思是“非常想，很乐意”，如：I'm sure he'd be only too glad to help you．我肯定他很乐意帮助你。so far as达到……的程度，如：So far as I know，that's highly unlikely．依我看，那是极不可能的。provided that假若，如果，如：He can come with us，provided that he pays for his own meals．假如他自费用餐，那他可以跟我们走。unless如果不，除非，如：I wouldn't be saying this unless I were sure of the facts．要是我对这些事情没有把握，我就不说这话了。except that除……之外，如：I have earrings just like those，except they're blue．我的耳环和那些一样，除了它们是蓝色的。[译文]假如我们能找到保姆看孩子，我们将非常乐意参加你的聚会。