"The president's report," a smile on his face, he continued, "___ to several hot topics, discusses how to increase peasants' income."
Now that there are still some problems remaining ______, we have to work extra hours tonight.
It makes no difference to him______ you stay here or go to Hong Kong.
I think I have great writing ______, but it’s a pity that I don’t have a chance to realize it.
Everyone has a stage in their life ______ they seem to have trouble in everything.
---Tom, you are so excited! What has happened? ---______ I’ve passed the College Entrance Examination.