1. At present, currently, lately, recently, nowadays, these years, in the past several decades, over the last several years
2. At the turn of the century
3. Thanks to China’s reform and opening-up policy...... has witnessed great economic and social progress in the past two decades.
4. With the (rapid, marked, amazing, eye-catching, remarkable, fantastic) development/ progress/ growth/ advance/ improvement of economy/ society/ industry/ living standard, great changes have taken place in...
5. At the mercy of the ever-acelerated updating of science and technology, there are rapid changes in all aspects of our everyday lives.
6. With the arrival/ advent of the invention of .../ the information age/ the 21st century/ the economy age
7. We are now entering a brandnewera. The 21st century is a time of advanced scientific and technological knowledge.
8. The human race has entered a completely new stage in its history. We have just crossed the threshold of the 21st century and the curtain of the new millennium is slowly rising.
9. We are blessed with new opportunities and faced with new challenges.
10. With the increasingly more rapid economic globalization and urbanization, more problems are brought to our attention.