________ is as much an art as it is ________ science.
#95530
A
Cloning; a
B
Clone; /
C
To clone; the
D
Cloning; the
推荐题目
After hearing the bad news, Susan found herself of it from time to time while at work.
#91583
A
to think
B
thinking
C
though
D
having thought
. _______ different kinds of pianos, the workers farther improved their quality.
#97438
A
To produce
B
Being produced
C
Produced
D
Having produced
I’m sorry, but I didn’t mean to keep you _____ here for a long time. Can you forgive me?
#94323
A
wait
B
waiting
C
to wait
D
waited
In April, 2009, President Hu inspected the warships in Qingdao, ______ the 60th anniversary of the founding of the PLA Navy.
#98916
A
marking
B
marked
C
having marked
D
being marked
The football player felt guilty because he said some really cruel things, but actually he wouldn’t stand _______their team lose.
#97189
A
seeing
B
to see
C
having seen
D
to have seen