常见的工具痕迹的种类有哪些？
参考答案：
有撬压痕迹、打击痕迹、擦划痕迹、钳剪痕迹、刺切痕迹、割削痕迹等。
—Were you often late for school last term, Tom?
—_____. I got to school early every day.[ ]
A. Always
B. Usually
C. Sometimes
D. Never
采购发票有几种增加方法？（）
A.拷贝采购到货单
B.拷贝采购入库单
C.拷贝采购订单
D.拷贝采购发票
for school last term, Tom?