안녕하세요.

135.
this approach caused as many problems as it solved because time a particular product stayed on the floor was still too long.

time이 the time으로 바뀌는게 답이던데요. 관계절이 뒤에서 한정하고 있다는데 어디요??165.
the separated fat in daily foods is thought to be a factor in heart disease.

to be 가 빈칸이었는데 답이래요.
the~foods까지가 원래 that절 목적어였어서 앞으로 가면서 to be가 되었다는데..
저는 왜 to be가 되는지 잘모르겠어요ㅜ

알려주세요~~ㅠㅠ