单项选择题

Nowadays nearly all banks have adopted the () system to ensure the security of customers’ financial deposit.

A、secret
B、password
C、clue
D、hidden

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单项选择题

I‘m usually ____________ by beggars and drunks as I walk to the station.

A、battered
B、ragged
C、accosted
D、terraced

单项选择题

He is working very hard for fear that he______behind.
lag
B、could lag