There is ’s’ and ’u’ in the word’ understand!
----Why does your teacher _________ play basketball?-----Because he does not have much free time to play it.
---Which one is different from others?---I think it is ________.
---Shall we go and ______ hello to the old man?---Good idea! Let’s go.
---When is your birthday, Kate?---It’s _________ 9 October.
---__________does your friend go roller skating? ---About once a week.