The first textbooks ____ for teaching English as a foreign language came outThe first textbooks ___ for teaching English as a foreign came out in 16th.A.being written B.to be written C.being writing D.written选D 是因为做定语从句的时候就固定用written 可以having been written

问题描述:

The first textbooks ____ for teaching English as a foreign language came out
The first textbooks ___ for teaching English as a foreign came out in 16th.
A.being written B.to be written
C.being writing D.written
选D 是因为做定语从句的时候就固定用written
可以having been written