Thanks _____ the photo of your family.[ ]

Listen! Peter is singing in the classroom! —It _____ be him. He has gone back to his hometown.

Where did you ______on vacation? —I_____to Shanghai.

Alex: Why are you still here? It’s almost eight o’clock. Tom: Because I my work. Don’t worry. It’s almost done.

We all find ________dangerous to skate on the thin ice.