nockedat the door—I’ve no ideaI just pretended nobody was at home, so I didn’t ask who ____ was

The Chinese teacher often requires the students to talk about writers and books________they like most.

What did you do last weekend, Jack? — Well, I ____ to see a film, but in the end I stayed home doing nothing

We have had several visits ______the famous nature zoo.

It’s always difficult being in a foreign country, ___________if you can’t speak the language