——Did Jack come back early last night?

——Yes. It was not yet eight o’clock _______ he arrived home.

A．before

B．when

C．that

D．until

注意饮料机的配件清洗后在消毒水里浸泡（）min消毒，滴干水后自然风干。

A、4-5

B、3-4

C、2-3

D、1-2