Whencomestoresearchintoheartdi

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When ______ comes to research into heart disease and its effects on the body, we do not have adequate substitutes for the use of animals.

A．that

B．it

C．this

D．what

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the new dormitory, Ms. Jin, the headmaster, was inspecting our living conditions.

A．Entering	B．We entering
C．Having entered	D．We entered

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I turned to the beggar-looking man ________ next to me, onlythat he was my ex-husband.

A．seating, to find	B．being sitting, finding
C．to sit, finding	D．seated, to find

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my mom not totrust those people easily, shewouldn’thavebeen cheated out of 50,000 yuan.

A．IfIwarn	B．IfIshouldwarn
C．HadIwarned	D．IfIwarned

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With the aid from the whole country, the people in the flooded area of northeastern China managed to______this unforgettable summer of 2013.

A．go through	B．look through
C．break through	D．rush through

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As he never raises a finger to help me with the dinner, Ithe thanksgiving meal from this afternoon till now.

A．have been preparing	B．prepared
C．had been preparing	D．prepare

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