________ exchange student from Spain is ________ university student.

______ is Yiwu River?—About forty kilometers.[ ]

I was not good at math, so my friend helped me _____ it last night. [ ]

Look at the boy running on the playground. Is it David? —It ______ be him. I saw him go to the teachers’ office just now.

I can’t find my dictionary. May I use ______? –Sure. Here you are.