If the tyre leaks, you should first ______.
A: check the valve
B: replace the tyre
C: go to the repairman
D: pump some air into the tube
A: check the valve
B: replace the tyre
C: go to the repairman
D: pump some air into the tube
举一反三
- A tyre _____ when you pump air into it, it shrinks when the air is gone. A: committed B: favored C: switched D: transmitted
- The central heating system seems to ________. You should call the repairman to check it. A: go wrong B: going wrong C: have gone wrong D: having gone wrong
- 中国大学MOOC: The central heating system seems to ________. You should call the repairman to check it.
- 7) You can increase a tyre’s grip in winter by slightly___________its pressure.
- You can increase a tyre’s grip in winter by slightly lower its pressure. ( )