The problem is __________ for Tom to work out.

A warm thought suddenly came to me ______ I might usethe pocket money to buy some flowers for my mother’s birthday.

Where is Mr Green now I haven’t seen him for a fewdays .—He _____ to Hong Kong .

What do you think of being a volunteer ___________ the Youth Olympic Games—Well, I feel proud that I can work here ___________ a volunteer.

____ is the population of your city– About seven ____.