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
When we get closer to the moon, we shall feel its gravity pulling us, but it will not be ________ the earth’s.
#17971
A
as a strong pull as
B
a pull as strong as
C
as strong a pull as
D
as strong pull as
Now the Chinese eat      as they actually need every day.
#20709
A
twice as much protein
B
twice protein as much
C
protein as twice much
D
protein twice as much