参考答案

正确答案：A
解析：选项A和C都与“现在”有关，但是，选项C强调“与过去相比”(now，compared with what happened in the past)，例如：Nowadays people are rarely shocked by the sex they see on television．Most people nowadays are aware of the importance of a healthy diet。正确答案为A“现在，这会儿”(now，at the moment)。