___________2010 Shanghai World Expo will launch ___________underground network of 700 kilometers of pipes to provide natural hearting and cooling.
I shall never forget the day Shen Zhou V was launched , has a great effect on my life .
These countries will join one another against terrorism, was agreed to at the international conference.
Yesterday evening I came across the man _____ you think is pleased to _____.
In some countries, _____ are called “public schools” are not owned by the public.
—I’d like to invite you to my birthday party this evening.—Thanks, but ____ I’ll have time I’m not sure at the moment.