Tom was wild with joy when his mother told him that his stolen bike had been ______.
When I try to understand _______ that prevents so many Americans from being as happy as one might expect, it seems to me that there are two causes.
The science of medicine, _______ progress has been very rapid lately, is perhaps the most important of all the sciences.
—Which day do you think is all right to our next meeting? —You make _______,_______ day is all the same to me.
—Jack, what do you think of the new work? —It's not bad. But the hours are too long. —Oh, _______
_______ the meeting room,he found all the parents already _______ there.