题目

Roman numerals were invented over 2,500 years ago. They came from ancient Roman. The Romans were active in trade and business. They had a system of writing, but they needed a way to record numbers so they developed their own system of numbers. That was Roman numerals. Around 500 AD, a new number system was born in India. It was later known as Arabic numbers because it was largely used by Arabian businessmen and people. Roman popes (教皇) stopped the use of Arabic numbers when the new system came to Europe. They said that Roman numerals were invented by God and were perfect to use. However, c20．She hardly knew how to solve this math problem．（完成反义疑问句）She hardly knew how to solve this math problem，did she？