One of the sides of the board should be painted yellow, and .
----What made her so upset? ----________.
Barack Obama delivered a speech to 500 local youths during his visit to China, many of ________ from Fudan University and Tongji University.
Don't be discouraged. _________things as they are and you will enjoy the days of your life.
Sorry I’m so late, but you cannot imagine ________ great trouble I took to find your house.
Too high house prices can be brought under control, _______ the authorities introduce a series of regulatory policies.