`33.` He is very rich but he isn't happy.

`34.` He got a good job but he was not satisfied.

`35.` He often tells lies, many people believe him

`36.` Mary was sick so she didn't go to school yesterday.

`37.` She felt tired so she went to bed early.

`38.` Margaret's mother was sick so she stayed at home.

`39.` The test was difficult so I couldn't do the test.

`40.` The letter was so dark so I couldn't read the letter.

`41.` It is noisy so I can't study.

`=>` Notes: Nếu dùng Although thì thôi But mà dùng But thì thôi Although 

(chỉ được dùng một cái ;-;) 

$@Pipimm~$ ;-;

33. He isn’t happy although he is very rich. (but)

=He is very rich but he isn’t happy

34. Even though he got a good job, he was not satisfied. (but )

=He got a good job but he was not satisfied

35. Although he often tells lies, many people believe him. (but)

= He often tells lies but many people believe him

36. Mary didn’t go to school yesterday because she was sick. (so)

= Mary was sick so she didn’t go to school yesterday

37. She went to bed early because she felt tired . (so)

=she felt tired so she went to bed early

38. Margaret stayed at home because her mother was sick. (so)

= Margaret's mother was sick so Margaret stayed at home

39. I couldn’t do the test because the test was difficult. (so)

= the test was difficult so I couldn’t do the test

40. I couldn’t read the letter because it was dark. (so)

= it was dark so I couldn’t read the letter

41. I can’t study because it is noisy. (so)

= it is noisy so I can’t study