I don’t think it is __________taking the trouble to explain the question to him. 
#19163
A
worth
B
worthy
C
worth of
D
worthwhile
推荐题目
 She looks very _____ but I can’t remember her name.
#20651
A
similar
B
familiar
C
friendly
D
strange
---Is Medicine a science?   ---Well, nowadays, most doctors recognize that medicine is ____ it is a science.  
#19769
A
an art as much     
B
much an art as   
C
as an art as much
D
as much an art as
It is ________ that I can still remember ______ was discussed at the meeting.
#19897
A
sure; when
B
sure; what
C
certain; when
D
certain; what