第1个回答 2010-11-22
3since this century, too many natural resources have been used.
4he is the only student that was late this morning.
5As far as we know, Africa is the second largest continent in the world.
第2个回答 2010-11-22
4)Since this century, too many natural resources have been used. 5)He is the only boy who was late for school this morning.
第3个回答 2010-11-22
1.Since the beginning of this century, too many natural resources have been used
2.He is the only student who was late this morning
3.As far as we know,Africa is the second-continent in the world
第4个回答 2010-11-22
3. Ever since the start of this century, too many natural resources have been put into use.4. He is the only student late for today. 5. As far as we know, Africa is the second largest safari in the world.
第5个回答 2010-11-22
3.Ever since the beginning of this century, too much natural resource has been used.