The aim of the trial operation of Shanghai Expo was to _______ problems, if any, so that the organizers could make changes accordingly.
There is something wrong with your bike and you’d better _______ it _______ and repair it.
The boys were so angry that they went __________ something to eat.
There is no doubt _______he will come tomorrow, but I do doubt _____he will come on time.
Catherine II had the Amber Room _________ to a palace outside St Petersberg where she spent her summers.
A great person is someone who ___________others.