________ 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.