The first textbook ______ for teaching English as a foreign language came out in the 18th

外语类 已帮助 人

The first textbook ______ for teaching English as a foreign language came out in the 18th century.

A.having written

B.to be written

C.being written

D.written

请帮忙给出正确答案和分析,谢谢!

热搜:关于氨基酸代谢错误的论述是_________。