19.It is known that Antarctica,the world's coldest continent,is hard ____.[A] to reach [B] reach [C] be reached [D] reaching

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19.ItisknownthatAntarctica,theworld''scoldestcontinent,ishard____.[A]toreach[B]reach[C]bereached[D]re

19.It is known that Antarctica,the world's coldest continent,is hard ____.[A] to reach [B] reach [C] be reached [D] reaching
19.It is known that Antarctica,the world's coldest continent,is hard ____.
[A] to reach
[B] reach
[C] be reached
[D] reaching

19.It is known that Antarctica,the world's coldest continent,is hard ____.[A] to reach [B] reach [C] be reached [D] reaching
A

选A。
在英语上，主系表+to do 结构，如果表语是easy，difficult，hard等充当，to do 主动表示被动。

It is known that Antarctica, the world's coldest continent, is hard _ to reach
_.

it is well known that it is known to all that 和as is known to all that 区别 it is well-known that,还是it is well known that到底是哪一个?well known和 well-known有什么区别？ It is well-known that a dove symbolizes peace.无用It is well-known that…造句英语翻译It is well known that ( ) 括号内填什么? It is known to all that sea water__(contain)salt. it is well known to us that是什么意思 It is well-known _________to all is that Taiwan is the largest island in China.A.As is known B.As we know C.It is known D.What is known It’s known to all that.把it换成what,that后面为什么要加上is. may it be known that _______,the compass was first made in China.A.It is known to all B.We all know C.As is known to allD.Itis known that It is said/thought/known/reported/estimated/believed/ (that)是什么意思It is said/thought/known/reported/estimated/believed/ (that) 是什么意思最好在造个句子 It is weii known that Taiwan is a part of China It is (wide) known that Ba Jin is one of the greatest writers in China . It is well-known that the Nansha_____（岛）is our country's in history.RT It is said believed/known/supposed that he is from Africa.翻译