The inner part of the condenser should be cleaned with （）.
举一反三
- Fuel injection valves should be taken out， cleaned， and lifting checked every （）.
- Our boss is taking everyone to the ballet tonight, and I need to make sure my new dress ______ for the occasion. A: has been cleaned B: should have been cleaned C: is being cleaned D: has been cleaning
- which part should a writer
- A good lead-in part should be______.
- Students should an active part in campus activities.