A.origin
B.roof
C.base
D.root

A.put off
B.took off
C.got off
D.cut off

A.accept
B.support
C.window
D.employ

A.accept
B.support
C.window
D.employ

A.embarrass
B.introduce
C.defining
D.encourage

A.furious
B.relaxed
C.anxious
D.upset

A.furious
B.relaxed
C.anxious
D.upset

A.publishing positive information
B.providing positive information
C.investigating negative information
D.concealing negative information

A.Bill Gates' proposal for taxing robots
B.Bill Gates' opposition to taxing robots
C.Bill Gates' opinion on automation
D.Bill Gates' support for automation

A.Hồng ngoại.  
B.Ánh sáng màu chàm.
C.Ánh sáng màu tím.
D.Tử ngoại.