When did your father ____ your mother?
Look the pictures.[ ]
Green economy offers a new model ________ people could both protect the climate and develop the economy, according to what Li said at the International Cooperative Conference on Green Economy and Climate Change.
______ are you staying there? —For about 3 days. I don’t like to be away for too long. [ ]
Have you seen _____ empty box?— Do you mean _____ box you showed to me yesterday? I put it in your schoolbag.