The number of the students in our grade _______about six ______, ______ of them are girls.
When I opened the fridge, there ______ only some eggs and a bottle of milk.
— Did you meet ______ interesting at the party? — Not really.
I like this room. You ______ see the mountains from the window.
Which book is ______ to understand, this one or that one?
I phoned Sarah last night, ______ there was no answer.