The researchers found clear and convincing evidence _________ happiness is the key when it comes to better health and longer lives.
#30504
A
where
B
whether
C
how
D
that
推荐题目
Generally speaking, being hard-working is just ______ it takes you to be successful in your career.
#34445
A
what
B
that
C
where
D
which
Overseas Chinese are particularly sought out for positions a high degree or leadership is required.
#30522
A
where
B
which
C
when
D
what
—Where is that report?—I brought it to you _______ you were in Mr. Black’s office yesterday.
#34347
A
if
B
because
C
when
D
before
Polly’s mother was anxious about ______ she could get home safely in ______ foggy a day.
#32748
A
whether; that
B
if; that
C
whether; such
D
if; so