Half of the class _____ done most of the work .The left _____ rather difficult.
--- When did you get to know the information? --- ____ I ____ yesterday.
--- What about yesterday’s homework, Amy?--- I found ____ hard to finish all the exercises.
--- I hear Andy and Lily are going to have a party to celebrate their ten years of ____ . --- Really? They have ____ for ten years?
--- The Greens have gone to Yangzhou for a trip, haven’t they ? ---____ , and they will return tomorrow afternoon.
--- The presidents of China and Russia had ____ interview a short time ago .--- And it was ____ great success. .