B。反说万能句
（1）However，asopposedtowhatgeneralpublicbelieve，反向观点。
（2）Onthecontrary，somepeopletakedifferentviewson…
（3）Sth。isanincreasinglywidespreadproblemthatitimposesadramaticinfluenceon…
（4）Althoughthereisnodenyingthat…，wecannotignorethefactthat+反向观点。
（5）Unfortunately，itisnotalwaysthecasethat…
C。举例万能句<ol><li>
Forinstance/Forexample…<li><li>
Takesthforexample…<li><li>
Atypicalexampleofthisis…Anotherexampleworthnotingisthat…<li><li>
Giventhefactthat+例子，weshoulddevelopanawarenessof…<li><li>
Acaseinpointisthe…。<li><ol>
D。万能高级句式<ol><li>定语从句（which+句子）<li><ol><