One of the main problems in the city is___________ pollution.
举一反三
- One of the main problems in the city is （） pollution. A: how to do away with B: how can do away with C: that to do away with D: that how to do away with
- 中国大学MOOC: The main types of water pollution are two kinds, which are pollution.
- One of the main reasons for air pollution is that many cars _______ smoke into the atmosphere.
- White pollution refer to plastic pollution.
- At present, one of this city’s most serious problems is housing that immediate solution.