1.Itisconsidered/thoughtthat人们(有人,大家)认为
2.Itisgenerally/usuallyaccepted/agreed/recognizedthat普遍(一般,通常)认为
3.Itisbelievedthat有人(人们,大家)相信
4.Itiswell-knownthat大家知道(众所周知)
8.Itisestimated/predicted/calculatedthat据估计(预计)
9.Itmustbepointedthat必须指出
11.Itmustbeadmittedthat必须承认
12.Itwillbeseenthat可见(可以看出)
13.Itwillbeseenfromthisthat由此可见
14.Itisunderstoodthat不用说(都知道)
15.Itcannotbedeniedthat无可否认
16.Ithasbeenproved/demonstratedthat已经证明
17.Itmaybeconfirmedthat可以肯定
18.Itmaybesafelysaidthat可以有把握地说
19.Itissometimesaskedthat人们有时会问
20.Itisexpectedthat/hopedthat人们希望