—Sure.It________via the bloodstream and causes ill health in a variety of organs.

　　A．concentratesB．circulates

　　C．accumulatesD．accelerates

　　7．(2017·马鞍山模拟)As is well­known，everyone is forbidden________in buses，regardless of what they are.

　　A．to smokeB．smoking

　　C．to be smokingD．to smoking

　　8．(2017·绍兴高三质检)The reason why I object to________with Mr Black in the same office is that he is a heavy smoker.

　　A．workB．be working

　　C．workingD．being worked

　　9．(2017·淄博模拟)The major of maths or computer science can usually give you the________to an employee in a bank.

　　A．regulationB．qualification

　　C．professionD．occupation

　　10．(2010·湖北卷)If I find someone who looks like the suspect，my________reaction will be to tell the police.

　　A．physicalB．immediate

　　C．sensitiveD．sudden

　　11．I wasn’t blaming anyone；I________said errors like this could be avoided.

　　A．merelyB．mostly

　　C．rarelyD．nearly

　　12．—It’s reported that there’s________big breakthrough in the cancer treatment.

　　—If only my son could be brought back to________life!

　　A．a；/B．/；a

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