--He must have received a good education in his childhood, ________ he?--________, he is polite and well-behaved and acts like a gentleman.
I haven't settled the problem of I'll go back home during the coming May Day.A which B. what C. whether D. where
---Don't be so naughty! Be your ________.---Got it.
--Excuse me, sir. Would you do me a favour?---Of course. What is it?---I ________ if you could tell me how to fill out this form.
The factory was built in a secret place, around ________ high mountains.
You will see this product made in this factory ________ wherever you go.