1．It was ________ (believable) that we were expected to leave home as soon as possible.
2．(2017年北京卷·阅读理解C)When some refuse vaccination and ________ (seek) a free ride，immunity breaks down and everyone is in even bigger danger.
3．She ________ (phone) someone, so I nodded to her and went away.
4．(2019年江苏卷·完形填空)With their ________ (patient) and efforts, they successfully developed a combination of artificial breeding (人工繁殖) and natural reproduction.
