Answer:
a. acknowledge the speaker’s point, and try to connect to the topic
Here is a sentence I made, he was indignant at being the object of suspicion
Unfortunately yes fortunately it hasen't happened yet hope this helps THE ANSWER IS YES
Yes it’s good, though it’d be better if you used “Your sister and my sister are best friends, they do many things together” that (and) word doesn’t seem necessary. Hope this helped :)
