3 When John woke up he was in the hospital,but he didn’t kno

3 When John woke up he was in the hospital,but he didn’t know how that had come ________.
a.about b.around c.by d.across
4.People who live in a small village are bound to see a good _______ of each other.
a.quantity b.amount c.deal d.degree
请帮忙选择,并讲讲原因