$4$. He didn’t come because of his sickness/being sick
$5$. Because of the thick fog, the train was late
$6$. Because of the bad weather, the plane couldn’t take off
$7$. Because of her mother's sickness, she stayed at home
$8$. Because of his good conduct, all the teachers love him.
$9$. Because of the noise, Mary couldn't sleep.
$10$. Because the wind is trong, they can’t go jogging.
$11$. Because he was ill, my friend was absent
$12$. Because it was dark, i couldn't read the novel.
`->`because of = because: bởi vì
`->`because of + N/N phrase/V-ing
`->`because + mệnh đề ( S + V )