1. So far, we have learned less than 2,000 words
2. He left for two months
3. His father died three years
4 in the past ten years, great changes have taken place in China
5 since since...
1. So far, we have learned less than 2,000 words
2. He left for two months
3. His father died three years
4 in the past ten years, great changes have taken place in China
5 since since...