35.All of the flowers now raised here have developed from those__________in the forest.
A. once they grew
B. they grew once
C. that once grew
D. once grew
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36.I had hardly reached the airport__________he started for his destination.
A. then
B. when
C. the moment
D. than
37.He insisted that we__________the night in his house.
A. would spend
B. shall spend
C. should spend
D. spent
38.At the back of the house, there is a path__________the river.
A. leads to
B. led to
C. leading to
D. has led to
39.Food and rent are more expensive than__________used to be.
A. it
B. that
C. they
D. both
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