We shall probably never be able to（） the exact nature of these sub-atomic particles. A.assert B.inform C.ascertain D.no-题目网

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I waited for you patiently, comforted you through （）, never chided you about bad decisions, and romped with glee at your homecomings, and when you fell in love.

A.heartbreaking and disappointment B.heartbreak and disappointment C.heartbreaks and disappointments D.heartbreaking and disappointing
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When working on his novel, he was perfectly cautious not to make even a （） of the pen.

A.slid B.slip C.glide D.skid
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The long simmering euthanasia issue has lately （） into a sometimes fierce public debate, with both sides claiming the mantle of ultimate righteousness.

A.boiled over B.boiled up C.boiled off D.boiled out
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With the retaking of Madrid in early December 1808, Napoleon regarded victory in the Iberian campaign as a （）. All that remained （） southern Spain and oust the British from Portugal.

A.de facto to occupy B.de facto was to occupy C.fait accompli was to occupy D.fait accompli occupy
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Society and civilization have reached very much the same point that was reached eighteen centuries earlier; it is strongly implied that the only real difference may be that they have （） nuclear weapons for a slightly longer time, heeding the lesson of the past to some extent.

A.held off using B.held out for using C.been held back to use D.held on to use
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