Jack ________ in the lab when the power cut occurred.
举一反三
- There would be a power cut so we were astonished when the whole house was ______ into darkness. A: dropped B: dived C: drowned D: plunged
- What______ when the accident occurred?
- When the whole（ ） is cut off, the power system will be disconnected or even paralyzed. A: Intermediate substation B: Hub substation C: District substation D: Terminal substation
- When he failed to pay his bill, the power company ______ the supply of electricity. A: set off B: cut off C: took off D: put off
- When did Jack hit upon the idea of decorating the cab? Jack hit on the idea when