The researchers found clear and convincing evidence ________ happiness is the key when it comes to better health and longer lives.
#32958
A
where
B
whether
C
how
D
that
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— Is it OK if I take this seat?—Sorry,___________.
#34157
A
here you are
B
take it
C
it is taken
D
never mind
Mr. Li, leader of the team, always think of _______ he can do more for his teammates.
#32037
A
what
B
that
C
how
D
if
—She was late for the party.—That’s _________she had forgotten the exact time.
#31013
A
why
B
how
C
because
D
whether
It's not necessary to explain the truth _____ there is spring wind, there is green grass．
#30388
A
which wherever
B
that which
C
which when
D
that wherever
—Coach，can I continue with the training?—Sorry，you can’t________you haven’t recovered from the knee injury.
#30235
A
until
B
before
C
as
D
unless