______, they couldn’t solve the mystery.
#84549
A
Tried hard as they
B
Hard as they tried
C
Tried as they hard
D
They tried hard as
推荐题目
Sitting under the willow trees ____ an old man.
#80242
A
is
B
are
C
is there
D
are there
You shouldn’t talk until ________ to.
#80887
A
asking
B
having asked
C
to ask
D
asked
 He doesn’t have money now.  ____, he would lend it to you. 
#80364
A
If some
B
If any
C
If not
D
If so
Not until _________ did man accept that fact that all living things must die.
#84066
A
did many years pass
B
many years past
C
many years had passed
D
many years have passed