_______ his son away to college, the old couple got more room in the house.
Elizabeth believed the dog would die if ________ to her cruel owners so she kept it.
Chatting online can be _____fun, but kids must be sure they stay safe on _____web.
—What’s the matter with Tim?—Oh. His electronic dictionary was left in a taxi accidentally, never ________ again.
____ that caused him to serve dinner an hour later than usual.
China ________ a sharp increase in the number of aged people over the past decade.