----What are you busy with? ---- The conference_______ in our city next week.
As a matter of fact,his remarks left me ______ about his real purpose.
_______ difficulties we may com across, we'll help one another to overcome them.
So little known _____ that soldiers had to ask for a guide.
This monument was built in honor of the scientist who was believed ______ the first telephone.
I have kept that picture ______ I can see it every day,as it always reminds me of my university days in London.