It's ten years since the scientist _______to discover the valuable chemical.
#13947
A
kept up
B
set out
C
took in
D
set about
推荐题目
About ___ of the teahers is our school ___ young people under thirty.
#14469
A
two-five, are
B
second-fifth, is
C
two-fifths, are
D
two-fifths, is
These stories are about the everyday life of ordinary people who the great dangers in China over the past few years.
#11704
A
have experienced
B
are experiencing
C
have been experiencing
D
experienced
There is no doubt_______ English is the widely used language all over the world.
#11290
A
that
B
whether
C
if
D
how
After about one hour of the play between China and Korea, the ______ was 3-2 in our ______.
#13763
A
score; favour
B
score; side
C
point; favour
D
point; side
A qualified doctor has to constantly update his knowledge in order to maintain his professional _____.
#12050
A
conscience
B
competence
C
conservation
D
convenience