They were walking along the shore _______ a huge wave appeared out of nowhere, sweeping them out to sea.
#34229
A
as
B
while
C
when
D
though
推荐题目
The _____ you make, the _____ you will make.
#30387
A
more efforts ; greater progress
B
greater progress ; greater efforts
C
more efforts ; more progresses
D
many more efforts ; much progress
People living in the desert choose to keep their ancient lifestyles and customs, _______people in cities throw away their cultural traditions.
#31532
A
when
B
if
C
unless
D
while
____ is certain, though, is that the mystery of Tutankhamun’s tomb has never been fully explained.
#33776
A
It
B
What
C
This
D
As
From space, the earth looks blue. This is ____about seventy-one percent of its surface is covered by water.
#30949
A
why
B
how
C
because
D
whether
Children of this age should be reminded of________ to do in public places.
#30654
A
what
B
whether
C
how
D
why