He has been told many times that his casual clothes are not ____ for some formal occasions．

While there are quite a few differences in the education system, in many countries education is ____.

It is difficult for a teacher to give         attention to children in a large class．We should reform the situation in order to meet each child’s needs．

I usually go shopping in that supermarket, because their prices are _____.

Some 6.6 million tickets are      through the London website over a six-week periodand organizers say all applications will be treated equally.