I can’t give my son the leading position______, he is too young; secondly, I want MrSmith to have the job

Children who are not active or diet is rich in fat will gain weight quickly.

we stood at the top of the building,the people below were hardly visible.

He could only ____ in bed with all kinds of things rushing through his mind. [ ]

Without his illness, our English teacher _______ to the zoo with us last Sunday.