—No wonder he ______perfect English.
斯塔夫里阿诺斯在《全球通史》中写道：“欧洲……令人欣慰的景象却被突然到来的大萧条（始于1929年）给彻底破坏了……在西方的经济确实是一团糟的同时，苏联正在继续进行经济发展方面的独特实验。”苏联的“独特实验”是（ ）
读图，它是新民主主义革命时期中共某次军事行动的主要路线图，这次行动应该是
若3x=4，9y=7，则3x﹣2y的值为____
阅读下面的短文，从所给的单词中选择合适的单词补全短文，每空只填一词，每词只准用一次，注意书写工整。
fly, flying, buy, take, taking, stay, bought, with, was, favourite, bored, fever
Sam ____ very sad last weekend. He was ill. He had a ____. His mother asked him to ____ in bed. He was very ____. Saturday afternoon, his good friends Tom and Mike came to see him. They ____a lot of fruit and some flowers for Sam. He was very happy.
This weekend, Sam is going to go hiking ____ his friends. They are going to fly kites, ____ pictures and play football. Because Sam likes____ kites. Tom's hobby is ____ pictures. And playing football is Mike's____ sport.
