It _______ long before we ______ the result of the experiment.

一You seem to be familiar with this city．一I_____ here for three years．It’s great to be back．

（2014年山东日照市高三校际联合检测）4．—How long have you been here，Susan?—Only about half an hour．Beth________here with me．【考点】考察时态

 Last year, he wrote to tell me that he ______ his new dance. But I ______ of him ever since.

She won’t be able to come next week, because she _________ herself in Mount Tai then.