You seem to be familiar with this city!— I _______ English in a high school here for three yearsIt’ s great to be back! [ ]

Some areas, ____ their severe weather conditions, are hardly populated.

What do you like to do _______ class— I like to play volleyball.

____Lily ___Lucy can go with you , because one of themhas to stay here to look after their mother

Some researchers believe that there is no doubt______a cure for AIDS will be found.[ ]