( )the prices of household robots have come down, many consumers still can’t afford them.
A.正确答案AWhile
B.Because
C.Until
D.If
( )the prices of household robots have come down, many consumers still can’t afford them.
( )the prices of household robots have come down, many consumers still can’t afford them.
A.正确答案AWhile
B.Because
C.Until
D.If