1972年,他们被发现濒临灭绝.In 1972,it___ ___that they were___.
问题描述:
1972年,他们被发现濒临灭绝.In 1972,it___ ___that they were___.
答
was discovered endangered
1972年,他们被发现濒临灭绝.In 1972,it___ ___that they were___.
was discovered endangered