1 nathan mised the bus . he was late for school . (because)
--> Nathan was late for school because he mised the bus.
2 keep the food covered. the flies will contaminate it (or)
--> Keep the food covered or the flies will contaminate it.
3 julie has a guitar . she plays it very well . (and) 
--> Julie has a guitar and she plays it very well .
4 i need to study hard . I can get a good score on the test .( so)
--> I can get a good score on the test so i need to study hard .
5 he seemed a friendly person .I  didn't like him .( although )
--> he seemed a friendly person although I  didn't like him.
6 the food looks delicious . It tastes horrible .( but)
--> the food looks delicious but It tastes horrible .
7  mason fell . The floor was wet ( because )
Mason fell because the floor was wet .
8 anna took a part-time job . She needed some money .(so)
--> She needed some money so anna took a part-time job .

1 nathan mised the bus . he was late for school . (because)
--> Nathan was late for school because he mised the bus.
2 keep the food covered. the flies will contaminate it (or)
--> Keep the food covered or the flies will contaminate it.
3 julie has a guitar . she plays it very well . (and) 
--> Julie has a guitar and she plays it very well .
4 i need to study hard . I can get a good score on the test .( so)
--> I can get a good score on the test so i need to study hard .
5 he seemed a friendly person .I  didn't like him .( although )
--> he seemed a friendly person although I  didn't like him.
6 the food looks delicious . It tastes horrible .( but)
--> the food looks delicious but It tastes horrible .
7  mason fell . The floor was wet ( because )
Mason fell because the floor was wet .
8 anna took a part-time job . She needed some money .(so)
--> She needed some money so anna took a part-time job .