He works hard. Bob has a happy family

Bob King is an English boy. He is 13. He is a student of No. 1 Middle School. Look! This is a photo of his family. The boy is Bob. He is smiling（微笑）. The girl is his sister. Her name is Lily. She is only 7. His grandparents are old. But his parents are young. Linda is his mother. She is beautiful. She is a housewife. His father, Ben, is a businessman. He works hard. Bob has a happy family. He loves it very much.
想问下He works hard在这里是什么意思？还有就是Bob has a happy family那里为什么用has?

he works hard,so he can _____? 单选题:he works really hard,and____you. He works hard.He is full of ＿（condfident). He wants to pass the English exam.So he works hard ____ it. foolish as a person is,he can succeed in his work if he works hard.是什么意思？ Tom works very hard. He no more works here. Though he is _______worker he works Linda works hard, and ____.为什么 he works hard and neverbe late for school ，后用wasn't还是doesn't构成反意疑问句