1.That his only son was killed in a

1.That his only son was killed in a car accident was a ________ to the old man. A. heavy blow B. heavy beat C. heavy strike D. heavy attack2.When you are ______ claim your pension, you will receive a letter from your local social security office saying how much pension you will get. A. legible to B. eligible to C. possible to D. capable of 3.They may not have the academic qualifications but they are street smart and have extremely________. A. sharp minds B. high minds C. top minds D. quick minds4.They object to the use of _______ in scientific experiments for slaughter. A. living animals B. alive animals C. live animals D. lived animals5.The advantage to the supplier is that this enables him to build up links with a number of _______ A. old clients B. ancient customers C. aged customers D. regular customers6.The prospects for future generations to deal with climate change are depressing if we don’t achieve huge and rapid cuts in _______ of carbon dioxide and other greenhouse gases. A. launch B. transmission C. emission d. radiation7.There exist many serious problems in the exploitation and ____ of the water resources. A. utilization B. utilize C. utility D. utilized8.Doctors think his mother’s illness is acute rather than ______ A. slow B. chronic C. serious D. late9.The Internet has revolutionized the way that people communicate in a way that could not have been ______ even a few years ago. A. thought B. visualized C. envisaged D. envisioned10.One of the most common and toxic indoor air _______ is cigarette smoke. Experts believe about 90% of the lung cancers are caused by cigarette smoke. A. polluters B. pollution C. contamination D. pollutants