If mankind is trying to find new places in space to live and get new resources, it is fine.
A．the; the B．/; / C．a; the D．the; a
All flights because of the storm, they had to wait in the hall.
A．have put off B．were put off
C．have been put off D．having been put off
—Have you ever visited the Water Cube?
—Yes. When I served as a volunteer in Beijing, I it twice.
A．have visited B．visited
C．had visited D．had been visiting
—Did your sister get the position offered by the company?
—She failed in the job interview and is now in low spirits.
—I’m sorry for her.
— .
A．Thank you B．You’re welcome C．I would think so D．Never mind
—What’s your feeling now?
—I am terribly sorry. If only I here yesterday!
A．came B．would have come C．have come D．had come
My cousin has a large amount of money so that he can buy a house in the city center.
A．put away B．put off C．put out D．put down
