12. I'll go to the airport to meet my friends who come to stay with us this Christmas.

N (người) + who + V 

13. Although the weather forecaster predicted it was fine, it rained yesterday. 

Although + clause, clause: mặc dù 

14. Judy liked the full-moon festival very much which is celebrated in mid-fall.

N (vật) + which + V /S + V 

15. I want to go home because I feel sick.

Clause + because + clause: bởi vì 

16. On my mum's birthday my dad gave her roses which were very sweet and beautiful.

17. If Lan doesn't hurry, she will miss the bus.

if1 : if + HTĐ, S + will/can/shall ..  +V1 

18. Even though the keyboard wasn't working well, Mrs. Lan completed her letter on time.

Even though + clause, clause: mặc dù 

19. Ba is tired because he stayed up late watching TV.

20. I'm going to be late for school since the bus is late.

Clause + since + clause: bởi vì 

21. Even though Liz has an exam tomorrow, she is still watching TV.

22. Do you understand the word which the teacher wrote on the board?

23. Even though it was only the first time they met, they made friends immediately.

24. The planet is Venus that is closest to the Earth.

N (vật) + that + V / S + V 

25. Nancy, who lives next door, is very lovely.

26. Although the traffic was bad, I arrived on time.

27. The weather was bad so we didn't go camping.

Clause+  so + clause: vì vậy

28. If we plant more trees along the street, we will have more shade and fresh air.

29. Mr. Robinson, who was giving a talk on saving energy, was a famous expert.

30. I am studying very hard because I want to get good marks.

31. If the weather is fine, they will go camping.

32. Nam got wet because he forgot his umbrella at home.

33. Although Mr. Hai was tired, he still went to work yesterday.

34. The man who helped me with the work was rather tall.

35. They want to buy a new house so they are saving money.

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