—Hi,Albert,Ican’tfindmyreferen

—Hi, Albert, I can’t find my reference book!
—Sorry, I ______ it and I guess I put it on the top shelf with my things．

A．use	B．had used
C．am using	D．used

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Helen had to shout_____.

A．making herself	B．to making herself hear
C．making herself heard	D．to make herself heard

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A．doctors came to their rescue	B．the tall building collapsed
C．an emergency measure was taken	D．warnings were given to tourists

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A．being tired

B．having tied

C．to be tied

D．tied

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A．expected

B．to expect

C．to be expected

D．expects

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_____twice, the postman refused to deliver our letters unless we chained our dog.

A．Being bitten

B．Bitten

C．Having bitten

D．To be bitten

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