The underlined word retires in Par1 probably refers to _____()
A.people who go to bed
B.people who live in quiet places
C.people who have a lot of free time
D.people who give up their work
A.people who go to bed
B.people who live in quiet places
C.people who have a lot of free time
D.people who give up their work
B.products that are made from fossil fuels
C.factors that stop the climate change
D.changes that happen after the temperatures rise
B.Types
C.Contents
D.Ingredients
B.birds which sing early in the morning
C.people who like to stay up late at night
D.people who are early to rise in the morning
B.Holding papers in place
C.The idea of making a paperclip
D.The process of making a paperclip
B.experts on electric facilities
C.experts on the building materials
D.experts on protecting the environment
B.His daily striving
C.His superhuman will
D.His irresistible energy
B.reduce the effect of
C.a mat placed beneath the carpet of a sofa
D.a rug placed on the floor
B.Make something look better than it is
C.Attract children' s interest in something
D.Give people warnings about something
B.ties
C.weakens
D.strengthens
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