Veryfewpeopleunderstoodthiscontract,______wasveryobscure.
B
the language of which 引导非限定性定语从句，并在定语从句中做主语。句意为：没有几个人懂这份合同，合同的用词含糊不清。
重写句子：Whenwearerelievedofworkingpressuresoftheoffice,wecanenjoyhappinessandrelaxationathome.(modifyingphrase)
改写病句：Shakespearewrotecomedies,tragedies,romances,andtheplayswhichwerebasedonhistoricalevents.
重写句子：Ihavecheckedmydocumentsseveraltimes.Istillcan’findttheproblem.(compoundsentence)
改写病句：Insummer,Juannadidn’tlovetravelinginRomeshefeltitwastoohotthere.
Weareallconcerned_______hersafety.