简述烧结工艺的优点。
参考答案：
工艺简单；生产率高；对原料的要求低；投资少。
______ did you go last weekend, Sally? [ ]
A. When
B. Where
C. What
D. How
—How is Susan?
—Oh, she lives abroad, so I ________ ever her.[ ]
A. hardly
B. greatly
C. clearly
D. nearly
