If it's just about studies, pure sciences would be good. Reason
being, you will not have problems understanding parts of the
modules once you go JC or poly. It also save you some time reading
up and trying to understand.
Considering other factors, it may not be good for you to choose
pure sciences.
One, is your ability to cope. Some Secondary 3 students are
retained or they dropped or they are downgraded if the results are
not satisfactory. Most science students have to A Maths as well,
which adds on to the pressure. If you can cope, it's all right. The
worst is you take only one pure science subject, and if you drop
it, there may not be enough subjects to take O Levels, and you are
forced to continue doing.
Second, your strengths. Some schools have weird combinations, so if
the combinations happen to be your weakness, then it's going to be
tough for you.
The advantage of taking combined science is that the other science
subject can help pull up your science grades. For example, you are
good at Chemistry, but fail badly for Physics, your good Chemistry
marks will be able to help you pass Science. If you take pure, you
won't have such chance.
