31.She enjoys collecting dolls . 

-> S+ enjoy(s) + V-ing + ... 

-> S's + hobby + is + V-ing 

32.The weather was fine , so we went on a picnic .

-> S + clause , so + S + clause 

-> so : nêu kết quả của  1 sự việc/hành động 

33.I think (that ) playing board games is interesting .

-> S+ think + (that) + sth/doing sth + is + adj 

-> S + find + sth/doing sth + adj 

34.My sister has done volunteer work for two years . 

-> S+ started/began  + to V/V-ing + ... 

-> S+has/have + Vpp + since/for+...

35.My house is not similar to your house.

-> S+tobe/V + not + similar + to + N/pronoun

31. She enjoys collecting dolls.

- enjoy + V-ing: thích cái gì

32. The weather was fine, so we went on a picnic.

- so là từ nối (vì vậy)

33. I think board games are interesting to play.

- think (v): nghĩ

34. My sister has been doing volunteer work for two years.

- thì hiện tại hoàn thành tiếp diễn

35. My house is not similar to your house.

- similar to: giống với