Here are the completed sentences with the correct present form:
A: Can I borrow your calculator?
B: Sorry, but I am using it.See you in the morning. I leave in a minute.
I never wear a tie to work.
It refuses to start now!
If you drop it, it will explode! What will you do?
How long are you waiting for the bus?
You look really annoyed!
Ugh, don't show me that picture! I can't stand spiders!
Joan is lying on the beach the rest of the summer.
It is very silly!
Stop doing that! You are very silly!
I have finished my exams so I am looking forward to today, Paul!
It's ages since I have been to an Indian restaurant. Do you fancy coming today with me?
In winter, what do you wear?
Why are you looking at me like that? Have I done something wrong?
The coat does not fit me. I need a larger size.
Thanks for this great time. I am having a lovely evening.
This is an exam. Why are you talking?
I have not decided about buying a new bike yet.
The dog has been digging all the morning but it has not found any bones yet.
Every Easter my granny visits us and my mum and she argues angrily all the time.
Let's have a rest.
How many books has she edited so far?
We have been walking the whole day.
Feel free to ask if you need further assistance!