12. Most American cities are relatively small _____ population when compared with Shanghai and Beijing.
— Did you see a man in black pass by just now?— No, sir. I _______ a newspaper.
My parents don’t care _______ my pocket money goes, but one thing is for sure: the money spent must be worthwhile.
—Why didn’t you go to Mike’s birthday party yesterday?—Well, I _______, but I forgot it.
— How long is it ______ you picked up your badminton training?— It was not until my finance became better in last December ______ I started the training.
The young teacher found it hard to _____ his explanation in class to most of the class.