The first textbooks______for teaching English as a foreign language came out in th 16th century为什么不用TO BE WRITTEN 而用WRITTEN
问题描述:
The first textbooks______for teaching English as a foreign language came out in th 16th century
为什么不用TO BE WRITTEN 而用WRITTEN
答
这不是显然的嘛,“in th 16th century”在过去啊,“TO BE WRITTEN”表将来啊