s a very convenient place to live in,is an airport connecting all the big cities

He is feeling even worse.— That is because he ________ to follow the doctor’s advice then.[ ]

It was ______ that they all went swimming in the river[ ]

The film directed by Zhang Yimou is beyond praise and it has certainly ______ my expectations.[ ]

I think at the beginning of each book a__________ introduction to it is necessary.