Oh, boy, why are you killing your time this way? Can’t you find something _____ doing? 
#18652
A
useful
B
worthy
C
valuable
D
worth
推荐题目
----Be careful not to drop the Ming Dynasty vase.   ----Yes, we can’t be _____.
#20686
A
too careful
B
very careful
C
too careless
D
careless enough
____ the students in our school go to college in their teens.   
#18569
A
A good many
B
A great many of
C
A great deal of
D
A lot of