中国大学MOOC: While we were in Beijing that year, the Great Wall ________ .
举一反三
- While we were in Beijing that year, the Great Wall ________ .
- While we were in Beijing that year, the Great Wall ________ . A: is repaired B: was repaired C: was being repaired D: has repaired
- 中国大学MOOC: _________ were used to build the Great Wall in history.
- Last summer we went on a trip to Beijing. Among ______ places we visited were the Great Wall and the Summer Palace.
- 中国大学MOOC: While we were climbing the hill, the rain began to fall．