Look at the boy running on the ground. Is it David?– It _______ be him. I saw him go to the teacher’s office just now.
In our city, _______ middle school students want to work as a teacher in the future.
I enjoy around the lake when I go to that park every time.
We will arrive _________ Tokyo __________ the afternoon of March 3.[ ]
_______ to be much chance of our catching him up in the near future.