Everything we do is aimed at letting people____more happily.
A. will live
B. live
C. to live
D. lives
Researchers believe happiness can be separated____two types:
A. to
B. into
C. up
D. for
The happiness of your life depends____the quality of your thoughts.
A. with
B. in
C. upon
D. to
accomplish的名词是____
A. accomplishing
B. accomplishtion
C. accomplishing
D. accomplishment