中国大学MOOC: The central heating system seems to ________. You should call the repairman to check it.
举一反三
- 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: If the call is not for you, what should you NOT do?
- 中国大学MOOC: You have to _____ your check in order to cash it.
- 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
- 中国大学MOOC: You should make a schedule for your travel and dont change it.