----What made her so upset?
----________.
| A．Lost her bike | B．Losing her bike | C．She lost her bike | D．Because of losing her bike |
Barack Obama delivered a speech to 500 local youths during his visit to China, many of ________ from Fudan University and Tongji University.
| A．them | B．whom | C．which | D．who |
Don't be discouraged. _________things as they are and you will enjoy the days of your life.
| A．Taking | B．To take | C．Take | D．Take |
Sorry I’m so late, but you cannot imagine ________ great trouble I took to find your house.
| A．what | B．how | C．which | D．why |
Too high house prices can be brought under control, _______ the authorities introduce a series of regulatory policies.
| A．even if | B．as if | C．so that | D．provided that |