题干
"Tom, ______ rubbish into the river. You're polluting it," said Mrs White.
A：not throw
B：don't throw
C：not to throw
D：never to throw
答案(点此获取答案解析）
B
"Tom, ______ rubbish into the river. You're polluting it," said Mrs White.
A：not throw
B：don't throw
C：not to throw
D：never to throw
”和“
”表示两种不同原子．
