I really appreciate that your help is of great _________. 
#19778
A
useful
B
value
C
important
D
worth
推荐题目
Medicine shouldn’t be kept where it is _____ to children.
#18579
A
possible
B
obtainable
C
enable
D
accessible
I advise you to give up smoking for it is _____to your health.
#19443
A
harm
B
harmless
C
harmful
D
harmfully
 Reading without stop is a ______ piece of work.
#19922
A
tire
B
tired
C
tiresome
D
troubled