On_________more serious note, the scient
题型：选择题
问题：
On_________more serious note, the scientist pointed out that such pollution must have done much
harm to nature.[ ]
A. the, the
B. a, the
C.不填.,不填
D. a,不填
On_________more serious note, the scientist pointed out that such pollution must have done much
harm to nature.[ ]
A. the, the
B. a, the
C.不填.,不填
D. a,不填