21. Obama has been elected ______ president of the United States, and the international £¨¹ú¼ÊµÄ£©society expects to have ______ new USA under his leadership.

A. ²»Ìa                      B. a; the                   C. the ; a                     D. the ; the

22. Do come here tomorrow______ we, as planned, will enjoy the wonderful performance together.

A otherwise                B. or                     C. and                          D. therefore