(
A.in
B.against
C.at
B
)We should fight against
the pollution(污染).A.in
B.against
C.at
答案
4.B
(
A.stand by
B.stand for
C.stand up
B
)What do the letters(字母)UN stand for
?A.stand by
B.stand for
C.stand up
答案
5.B
登录