12. Tom’s house is __________  than Jerry’s.

A. higher                     B. more high               C. more higher            D. highest

13. They live a __________  life.

A. normally                 B. nomadic                  C. nomad                    D. nomads

14. This book is more __________  than I think.

A. interesting              B. interested                C. good                       D. gooder

15. We don’t have the custom __________ giving present at Christmas.

A. with                        B. in                            C. of                            D. on

16. Children like Tet __________ they can wear new clothes and receive lucky money.

A. so                            B. because                   C. therefore                 D. even though