It has been proved _______ eating vegetables in childhood helps to protect you against serious illnesses in later life.
#93434
A
if
B
that
C
what
D
when
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___________ has helped to save the drowning girl is worth praising.
#95078
A
Who
B
The one
C
Anyone
D
Whoever
Jack is a great talker.It's high time that he ________ something instead of just talking.(2012·辽宁)
#91917
A
will do
B
has done
C
do
D
did