2. have Mark and John ridden a horse? /yes, they have
3. has Eva ridden a horse? /yes, she has
4. has Mark eaten Japanese food? / no, he hasn't
5. has Jim goes to New York? / no, he hasn't
6. has Eva eaten Japanese food? /yes, she has
7. has Eva goes to New York? /yes, she has
Объяснение:
я ответил примерно в ответ- yes, she/he/they has/have
но вопросы правильные.
в множественoм числе "has" становятся "have"
Удачи!!
