✔ 最佳答案
i would recommend longman dictionaries.
a dictionary for advanced learner is definitely suitable for a form 3 student like you. take it easy, it's not as difficult as you imagine.
addition suggestion and opinion:
i've started to use longman dictionaries for advanced learner since i was form 1.trust me, it's not difficult at all.
besides such dictionary, i would highly recommend you to buy a theasaurus....cos you would need to have a great deal of vocabularies when you're in form 4.