21. What _____ pity that it is going to rain ! It is such _____ great fun to play in the field.
A．a; 不填 B．a; a C．the; a D．a; the
22. There’s no doubt 2013 will bring more change when the world economy is still unclear.
A．what B．that C．how D．where
23. Only then _______ realize I had said the words _______ the feeling of disappointment.
A. did I ; added to B. I did; adding to C. I did; added D. did I; adding to
