Our dining hall is always ________________ teachers and students at noon.

This isn’t my T-shirt. ______ is blue.

Excuse me, could you tell me _______? —There is a supermarket over there. You can get some there.

Our teacher told us that we must be strict ______ ourselves ______ our study. [ ]

Where’s David?—He ______ be in the playground because he is fond of playing basketball.