问题补充：
---Hey! Here is a message on my cell phone, telling me to send money to the bank account…
--Delete it! Its a trick. Many a person by such tricks.
A. were cheated
B. have been cheated
C. has been cheated
D. was cheated
答案：
A. were cheated
B. have been cheated
(答案→)C. has been cheated
D. was cheated
解析：句意：嘿，我的手机上有一个消息，叫我去给一个银行账户寄一些钱。删掉它，这是一个骗局，很多人都被骗了。Many a person表示许多人，形式上是单数形式，故谓语动词用单数，根据语境应该是已经被骗了，故选C
