3.22.

A. 　 pain

B. 　 adventure

C. 　 weight

D. 　 money

A. 　 ridden

B. 　 flew

C. 　 been

D. 　 gone

A. 　among

B. 　 between

C. 　 from

D. 　 across

A. 　 discovering

B. 　 returning

C. 　 borrowing

D. 　 making

A. 　 to have looked

B. 　 looked

C. 　 looking

D. 　 to look

A. 　 explained

B. 　 explain

C. 　 to explain

D. 　 explaining

A. 　 century

B. 　 battles

C. 　 thing

D. 　 years