In the United States, it has been necessary for ________ states to pass specific legislation to permit adoption.
A: single
B: singular
C: unique
D: individual
A: single
B: singular
C: unique
D: individual
举一反三
- The 1920s in the United States has been described as a period of _______.
- The United States has 48 states on the continent.
- He has been to the United States for five years and is used to (live) ______ there.
- In the United States, each individual is the subject of the hiring interview.
- In the United States the cost of living has been ____(持续地) rising for the past few decades.