The science of computer, _____rapid progress has been made in recent years, is the most important of all science.
If you are able to talk to a friend over the telephone, you feel that you are close ______ the actual distance is not shortened.
, the worse I seem to feel.
There was ______ time when everything to do with ______nature could keep Anne spellbound.
Leave your key with your neighbor ________ you lock yourself out one day.
—Shall I invite Tom to my party? —Yes. It’ll be nice if you .