Question

Let’s see if the baseball game has started yet. Started ? It must be clear who ( ) by now.

A、is winning B、wins C、has won D、would win

不是by加什么时态就用什么时态的完成时吗？为什么选A，而不是C？求详细解答

Answer 1

1. By now the power of the Roman Empire was on the wane.  
   到这时，罗马帝国已日益衰败。

2. By now, putting satellites in orbit is old hat to space scientists.  
   现在，对航天科学家来说，把卫星送入轨道已不是一桩新鲜事了。

3. By now she is redoing problems — how do I get characters into a room — dozens and dozens of times.

   到目前为止，她正在无数次地重复解决问题，我该怎么把一个个字母填入一个空位。

4. By now, all good designers and developers realize the importance of usability for their work.现在，比较牛的设计师和开发者都认识到了可用性在他们工作中的重要性。

5. Oh, and they go to Buckingham Palace to receive medals from the Queen and, by now, more or less accept it as their due.对了，他们还去了白金汉宫接受了女王的勋章，并且直到现在，或多或少地还是人们接受他们的原因。

   你应该明白了吧, 英语是活的,不是死的,要根据具体语境答题,不要太教条奥

Answer 2

now不是进行时么