________makes the book so extraordinary is the creative imagination of the writer.

The reason ________ he gave for his absence from the meeting was ________ he was caught in a traffic jam.

If you have any trouble, please ____________ to tell us.—I will. Thanks very much.

I must think of a proper gift for my mother，won’t be expensive but will make her happy.

Our General Secretary Hu Jintao attended the G8 Summit in Sweden, which _____ eight important advanced countries.