$1$. He studied hard therefore he passed the examination.
$2$. We want to buy a new house so we are saving money.
$3$. Although the sign was right in front of him, he didn't notice it.
$4$. Simon was busy therefore he didn't come to meeting.
$5$. Nick slept on the part bench since he had nowhere to go.
$6$. I am not afraid of him eventhough he is very strong.
$7$. He ate all the fruits though they were green.
$8$. We could do the test although it was difficult.