He made another wonderful discovery,_____ of great importance to science.
| A．which I think is |
| B．which I think it is |
| C．which I think it |
| D．I think which is |
—How about your journey to Mount Emei ?
—Everything was wonderful except that our car _________ twice on the way .
| A．slowed down | B．broke down | C．got down | D．put down |
A great person is always putting others’ interests _________ his own.
| A．below | B．above | C．in | D．on |
—Have you __________ ?
—No. I had the wrong number.
| A．got in | B．got away | C．got off | D．got through |
Ladies and gentlemen, please remain __________ until the plane has come to a complete stop.
| A．seated | B．seating | C．to seat | D．seat |
I like this house with a beautiful garden in front , but I don’t have enough money to buy__________.
| A．one | B．it | C．this | D．that |