六、即学即练:
一、用英语表达下列句子:
1)计算机的发明标志着一个新的时代的开始。
2)他用记号笔做了记号。
3)价格必须标在商品上。
二、选择填空
1)The sportsmen are all ready, waiting for the ___________ to start running.
A mark B sign C signal D symbol
2)__________with his name, the bag will be found soon.
A marking B mark C marks D Marked
,