1. 我们几年前去过那里
We went there (in the earlier) years.
2. 他们彼此认识很多年了（each other）
They have known each other for many years.
3. 除非明天下雨,否则老师们就去长城（unless）
The teachers will go to the Great Wall unless it rains tomorrow.
4 请用英语写出下列数字
579 five hundred and seventy-nine
6834 six thousand, eight hundred and thirty-four
19468 nineteen thousand, four hundred and sixty-eight
7189211 seven million, one hundred and eighty-nine thousand, two hundred and eleven
4153061905 four billion, one hundred and fifty-three million, sixty-one thousand, nine hundred and five 原创回答团(159号会员)