How hard is it to enter NUS nursing? (singapore)?

I am an international student. My predicted grades aren't pretty good as well i.e Cambridge A level with BBB(bio,chem, maths) and actual AS level General Paper grade B. Is it impossible to get in? Not a very impressive extra curricular activities too. In school, I am only a prefect and have only won some awards in school. I have done a week of attachment in local hospital visiting different departments. Should i even try to apply?