One benefit the author mentions is that the system ______
A: uses no electricity
B: has a fire-safety shutoff
C: docs not pollute the air in the house
D: requires less insulation in house walls
A: uses no electricity
B: has a fire-safety shutoff
C: docs not pollute the air in the house
D: requires less insulation in house walls
举一反三
- One benefit the author mentions is that the system______. A: uses no electricity B: has a fire-safety shutoff C: does not pollute the air in the house D: pollute the air in house
- The fire has destroyed the house. The house ________________ by the fire.
- The house ________ was destroyed in the terrible fire,has been repaired.
- The fire has destroyed the house. The house ________________ by the fire. A: has been destroyed B: was being destroyed C: is destroyed
- The poor _________. A: have no house to live B: has no house to live C: have no house to live in D: has no house to live in