---Do you mind my opening the window?----______I feel a bit cold.
Since a sharp fall of stockmarket (股市) many people have ________ making other investments (投资).
Some students use their cellphone ________ as a tool of entertainment.
There in Chongqing ________ great changes in climate this year.
—How much did they ________ for it? —I’m sorry I can’t remember ________, but I bought it at sale.
—Whom did she try to avoid meeting? —________ was a certain boy with the intention of marrying her.