__________ the reason , research shows that laughter is good for your health.
#15422
A
Whatever
B
Whenever
C
Whichever
D
However
推荐题目
Stop talking！l have ＿＿to tell you.
#57217
A
anything important
B
something important
C
important anything
D
important something
______ is often the case is that Tom doesn’t study hard and fails in passing an exam.
#15602
A
That
B
As
C
It
D
What