More people are choosing to work _____ retirement age，since the living expenses are shooting up sharply

He speaks English well indeed, but of course not ________ as a native speaker [ ]

I don’t know when she______.When she______, I will tell you.

In general，she is devoted to her studies，but she________be little naughty at times.

Can you tell me what you __________ when the teachercame into the classroom