几道简单的题目~~!!

1:a good laugh may make the hardness of life( ),as longas it's harmless and humorous.
A:give up B:go by C:fall off D:get over
2:there's little doubt( )our team will beat yours.
A:which B:whether C:if D:lthat
3:the thife was observed ( ) into the house and help himself to what he liked before the owner came back
A:to go B:go C:going D:gone
4.does the way you thought of ( )the water clean make any sense?
A.making B.to make C.how to make D:having making
5.which share do you intend ( )me?
you can take ( )half,the are exactly the same
A.to either B.to any C:for either D.for any
6.he hafd tired everything but int made little( )
A:effect B:difference C:broke D:break
7:he dropped the bowl.only( )it into pieces
A.breaking B.to break C:broke D:break 解释？