Itsuddenlyoccurredtohimhehadle

It suddenly occurred to himhe had left his keys in the office.

A．

whether

B．

where

C．

which

D．

that

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All the photographs in this book, _______ stated otherwise, date from the 1970s.

A．until

B．once

C．if

D．unless

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A．anything

B．something

C．anywhere

D．somewhere

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______ know where it is.

A．all

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A．Lack

B．Lacked

C．Lacking

D．To lack

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--- Albert, I have a favor to ask you.
--- _______.

A．It’s a pleasure

B．Go ahead

C．Help yourself

D．It doesn’t matter

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