There _____________ more trees if we all take care of our environment.
----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.