选择正确的译文，将它的序号写在题前的括号内。
1. 这是一个男人。
A. This is a man.
B. This is a woman.
C. This is a boy.
D. This is a girl.
2. 这些是男人。
A. These are women.
B. These are men.
C. These are boys.
D. These are girls.
3. 你能找到正在玩牌的孩子们吗？
A. Can you find the children playing cards?
B. Can you find the children play cards?
C. Can you find the playing children?
D. Can you find playing the children?
4. 他们正在买票。
A. They are crying.
B. They are buying tickets.
C. They are playing cards.
D. They are walking.
