Step 1 改正下列句中错误
1. We finished the task by 10 yesterday evening.
2. If he saw you yesterday, he would have asked you about it.
3. It was the first time we spoke together.
4. By the end of last term more than 3000 English words had learntby us.
5. He said that light traveled much faster than sound.
Step 2 听录音，填入空中所缺单词，录音听两遍
