We can use pencils or ______ to write
7个回答

other pens

我觉得最佳答案应该是other pens,(其他笔)...当然也可以填其他指定的笔,如pens 钢笔 、ball pens 圆珠笔、gel-ink pen中性笔……

knife

Is this Mary's backpack? No, it isn't.

改成一般疑问句 就是将be动词提前

Please call David at 555-4908. / Call David at 555-4908 , please.