Some people say / believe / hold the view /claim / suggest that______. Others criticize / point out / maintain / argue that______.
Nowadays it is universally / generally admitted / acknowledged / accepted / held that______. But I wonder/ doubt whether______.
Recently, the rise in the problem / phenomenon of has aroused public / popular /wide concern.
Recently the issue of______has been brought into focus / brought to public attention.
History never has the change of______ as evident as______. Nowhere in the world/China has the issue/ idea of______being more visible / popular than______.
Now people in growing / significant numbers are beginning / coming to realize / accept / be aware that______.
There is an old saying that / People often say / It is often quoted that______. How often we hear such statements / words as these.
______once said that______. We can learn from words that______.
For years, ______have been viewed as______.But people are taking a fresh look now. With the growing______, people______.
People used to think that______. (In the past，______.) But now people share a new idea of______.
Should/ What______Options of______vary greatly；some______,while others______. But in my opinion, ______.
Although the popular belief is that______, a current (new/recent) study(survey / poll / investigation) indicates (shows / demonstrates) that______.
It was reported by scientific studies that / Evidence had shown that______.