_____ that he isn’t adequate to the present job, he devotes all his spare time to studying  professional knowledge.
#95588
A
Concern
B
To concern
C
Concerned
D
Concerning
推荐题目
When it comes to __ in public, no one can match him.
#88386
A
speak
B
speaking
C
being spoken
D
be spoken
Don’t  pretend _____.Look!You are holding your English book upside down.
#92579
A
to read
B
to have read
C
to be reading
D
reading
          in the river for five hours, the thief looked very pale and exhausted.
#94452
A
Having been trapped  
B
Being trapped  
C
Trapping
D
Having trapped