按要求改写句子。
1. Welcome to China!(英译汉)
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2. He visited Big Ben last year.(改为一般疑问句)
__________ he __________ Big Ben last year?
3. Did your father go to a basketball game?(作否定回答)
__________, __________ __________.
4. here, I, by, came, plane (.)(连词成句)
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