【2020最新整理国开(电大)人文英语1-3896网上形考机考题库】____ day of June is International Children’s Day.

【2020最新整理国开(电大)人文英语1-3896网上形考机考题库】____ day of June is International Children’s Day.
选择一项：
A. The first
B. First
C. One