Don’t bother Tom, he is ______ with the experiment on water molecules in the lab. 
#69289
A
focused
B
fixed
C
occupied
D
concentrated
推荐题目
 "Will you be able to finish the job this week?"    " ___ ."
#83323
A
I can't say it
B
I don't know that
C
I'm not sure this
D
I don't expect so