This makes no sense what are you trying to say
This is false: it has a very negative connotation.
It refers to a smile that is mocking or contemptuous (or a remark that is mocking or contemptuos) - so it's not a genuine smile, but an ironic and sarcastic smile. It has a negative and not a neutral connotation.
I think its 3. "ill be glad to come to ur house tmr" thats when theyre coming
The topic sentence introduces the reader to what you will talk about.
B. They announce the main ideas of paragraphs
