Stamp collectors collect stamps relating to a particular theme. Sport lovers may try their best to find Olympic stamps ________ by various parts of the world every four years.
I would appreciate ______ if you could give me a reply as soon as possible.
– Do you mind if I use your English dictionary? – ___________.
Knowing ______ price of farm produce rose again, he sat down with ______ sigh.
It is you as well as your wife that ______ your son's bad performance at school.
Many questions were asked, particularly ______ the cost of the new plan.