题目内容
（请给出正确答案）
[主观题]
In fact "trick or treat" is ______.A．usually used by children to get sweets from othersB．a
In fact "trick or treat" is ______.
A．usually used by children to get sweets from others
B．a warning used by criminals to snatch something
C．a secret was used by protestant gunmen to kill somebody
D．an old saying, but not used now
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