They were surprised that a four-year-old boy should work out such a difficult problem ____ they themselves couldn’t.
#80212
A
once
B
then
C
while
D
if
推荐题目
----Do you think we can get there on time? ----Yes，_______ the truck doesn’t break down.
#31370
A
even if
B
so long as
C
until
D
unless
Just as Kobe Bryant said, Yao Ming has built the bridge for all of us, ____ is not only for the sport of basketball, but for the different cultures of this world.
#34764
A
who
B
it
C
which
D
that
I had just about given myself up for lost _________ I was spotted by a ship.
#30803
A
when
B
while
C
as
D
until
My brother has his own business — that’s also ______ I expect to do after I graduate from Harvard University.
#31626
A
why
B
when
C
that
D
what