Yeh I reckon, don't really think it works like that, it'd will be really slack I mean, just from one test after a years of hard work.But I will be dead if it does X(
Man ur teachers advise u to never do that.Just in case u get all the other sections wrong, especially if they come first then the section that u have learnt and are more competant in, becoz, they always mark the section that is answered first.
It really depends on the English tutor u have, try a few first they usually have trial lessons, n if u feel they're good then stick with them, if not leave at once, coz they may just be wasting ur time.