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【单选题】
Mary recently visited Shanghai. She was there last month.
A.
Mary visited Shanghai a short time ago.
B.
Mary visited Shanghai a long time ago.
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参考解析：
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举一反三
【单选题】Rome has several historic buildings. For example, the famous Forum is in Rome. It is about 2,000 years old.
A.
Rome has many important new buildings.
B.
Rome has many important old buildings.
【单选题】Rio de Janeiro has many skyscrapers. One of them is Ventura Corporate Towers. It has 38 floors. Some skyscrapers have more than 40 floors
A.
There are a lot of big offices in Rio.
B.
There are a lot of tall buildings in Rio.