Question

How you look at things in life ____ a great influence on your mood .

A. to have B. has C. have D. having

Answer 1

答案是
B.
has
How
you
look
at
things
in
life
(has)
a
great
influence
on
your
mood
.
你怎样看待生活里的事情（和东西）对你的心情有很大的影响。
主语
[how
you
look
at
things
in
life]
要当单数和
单数动词
has
搭配。
希望对你有帮助

Answer 2

how
you
look
at
things
in
life是主语从句所以用has而不用have
have
a
great
influence
on
是个短语
对...产生重要的影响