as soon as的用法As soon as they heard the loud noise,they went out to see what（）A was happening B was happened C has happened D will happen为什么答案是A而C不行?
2019-05-03
as soon as的用法
As soon as they heard the loud noise,they went out to see what（）A was happening B was happened C has happened D will happen
为什么答案是A而C不行?
优质解答
英语强调时态一致,C是现在完成时.句子的主时态是过去时,所选的选项也应该是过去某种时态
英语强调时态一致,C是现在完成时.句子的主时态是过去时,所选的选项也应该是过去某种时态