根据句意，用括号内所给单词的适当形式填空
I think________(speak)English is more difficult than written English．
She is a quick________(learn)，and her English has got better day by day．
Be more careful！Don’t make any________(mistake)in your writing．
I can’t follow what you are saying．Could you please speak more________(slow)？
If you don’t spend money________(wise)，you may go broke．