Thebackgardenofourhousecontainsalawn，（）verypleasanttositoninsummer.
A
「句意」 我家的后花园有一片草坪，夏天坐在上面会令你心旷神怡。
「难点」 which 引出非限制性定语从句，在句中作主语，且和sit on 构成宾关系。类似的句子有：This room is comfortable to live in 这句中 live in 和 this room 构成动宾关系。
At ______, photography is a chemical process, during which a light-sensitive material is altered when exposed to light.
Shewasonceayoungcountrywifewithchickensinthebackyardandaviewof_______mountainsbehindtheappleorchard.
ProfessorJohnsonissaid_____somesignificantadvanceinhisresearchinthepastyears.
_________, the most controversial candidate in the election campaign, he has been strongly criticized for his crude comments about women.
TheBentPyramidoutsideCairo__________ancientEgypt’sfirstattempttobuildasmooth-sidedpyramid.