帮我看2个问题1.it was mad of you to go skating on such thin ice.2.

帮我看2个问题
1.it was mad of you to go skating on such thin ice.
2.much new and high technology has been introduced from developed countries,thus___in a great increase in production of the company.
A.resultingB. resulted C.resultsD. which results
上面一个是改错题, mad改为crazy.我不知道为什么.还有第2个为什么是选a.而不能选d.