Dưới đây là các từ đã được viết thành dạng đúng để hoàn thành câu:

1. I have **forgotten** memories about my trip to Sentosa in Singapore. (forget)
2. Children nowadays are more aware of environment **protection** than we did in the past. (protect)
3. The most memorable part of our **tour** was the boat ride on the River Cam. (tourism)
4. England is very good at **preserving** its historic buildings and monuments. (preserve)
5. We are getting ready for our graduation **performance**. (perform)