The back garden of our house contains a lawn ，（） very pleasant to sit on in summer.
A
「句意」我家的后花園有一片草坪，夏天坐在上面會令你心曠神怡。
「難點」which引出非限制性定語從句，在句中作主語，且和siton構成賓關系。類似的句子有：Thisroomiscomfortabletolivein這句中livein和thisroom構成動賓關系。
Hesetupinbusiness____hisownandwasverysuccessful.
Time _____, the celebration will be held as scheduled.
Although____Spanish， he attended the course.
_____ him tomorrow.
_____nocauseforalarm,theoldmanwentbacktohisroom.
