________we went to visit Professor Smith, he________his research work.
#31550
A
The first time; devoted to
B
Whenever; was concentrate on
C
For the first time; was busy with
D
Each time; was absorbed in
推荐题目
________ on a clear day, the beautiful scenery gives him a sense of peace.
#31219
A
Walking
B
If walking
C
While walking
D
When one is walking
She thought I was talking about her daughter in fact，I was talking with my daughter.
#30615
A
whom
B
where
C
which
D
while
We should be able to do the job for you quickly, ____you give us all the necessary information.
#79744
A
in case
B
so long as
C
if only
D
as far as
_______________, the players began the game.
#31158
A
Having take our seats
B
Taking our seats
C
Being taken the seats
D
After we had taken our seats
It has been 60 years ______ the two countries established diplomatic ties.
#33197
A
that
B
after
C
from
D
since