Researchers have found clear and convincing evidence ________ happiness isthe key to better health and longer lives.
#92775
A
where
B
whether
C
how
D
that
推荐题目
_____when she started complaining.
#93158
A
Scarcely did he arrive
B
Hardly had he arrived
C
No sooner had he arrived
D
Not until he arrived
Do you think ______ important _______ us to learn a foreign language?
#94745
A
that; of
B
it; for
C
this; is
D
that; for