The machine has been used many years. It’s no wonder that it doesn’t work well________. 
#10744
A
regularly
B
constantly
C
occasionally
D
frequently
推荐题目
You should study the details of the policy        before you sign it.
#11635
A
in return
B
in advance
C
at ease
D
on purpose
 We always keep ______ spare paper, in case we run out.
#13546
A
too much
B
a number of
C
plenty of
D
a good many
Education should not be considered to be a(n) ______ in a modern society.
#12490
A
privilege
B
acquaintance
C
advantage
D
affection