21. After the 5-hour long journey, all the tourists were _____ and desperate to have a good rest．
A. turned out B. given out C. let out D. worn out
22. He is really considering ___ himself to _____ these children of the earthquake-stricken area.
A. to devote, educating B. devoting, educate
C. devoting, educating D. to devote, educate
