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(   ) 21. - Look£¡What’s ___________ in the sky?
- It looks like a kite.
A. this                B. that                 C. those
(   ) 22. - When did your uncle _________ in Shanghai?.
        - The day before yesterday.
A. arrive              B. get                  C. reach
(   ) 23. - How can I see thick snow in most northen parts of China?.