.--- We will have a class meeting next week?--- What’s date of _____ meeting?--- _____ is on Ju

.--- We will have a class meeting next week?--- What’s date of _____ meeting?--- _____ is on Ju
on July 5.我做的和一楼一样 但答案给的是this;this 想知道合理解释 如果第一空用了this是不是第二空一定要用this？