29. We haven't seen him for two weeks.

S + has/have +not + V3/ed + for/since + time 

30. "Chua Xu temple" is visited by thousands of tourists every year.

S + am/is/are + V3/ed: bị động - thì HTĐ

31. Because the water is polluted, we can't swim in this river.

Because + clause, clause: bởi vì 

32. I saw some people and some animals that were working the farm.

N (người / vật) + that + V/ S+ V 

33. Although Mary was in grade 8 she won a scholarship.

Although + clause, clause: mặc dù

34. The book which my father bought yesterday is very interesting,

N (vật) + which + V / S+ V 

`color{orange}{~MiaMB~}`