QUESTION N0. 1 {35 marks) Ms Winter, an IELTS training teacher teaching in an educational institution recently posted the following advertisement in Education Newspaper, which is a popular newspaper: \"Willing to get 10 or above in lELTS exam? Join us! After taking our classes, if you still cannot get 'i' .0 in the IELTS test, you will get the whole refund of tuition fee ofHK$20,000 plus HK$1 .000. l have already deposited HK$2,000,000 of guarantee to show my sincerity. If you are happy to accept this, please come to pay your tuition fee, and join our classes.\" After Alice paid the tuition fee and had attended half of the lessons, Winter told Alice that \"sorry, the original advertisement is abolished, and you cannot get any refund of tuition fee of HK$20,000 plus l-lK$1,000\". After that, Alice continued to participate and completed ALL tutorial lessons but she nally got only 6.0 in IELTS. Alice decided to sue Winter but Winter argued that the advertisement was merely an invitation to treat and should not be treated as an offer. Moreover, she has informed Alice that she cancelled the original advertisement. (d) Alice paid the tuition fee by \"bill of exchange\