Ways must be found to prevent the poisonous gases ________ polluting the air.
A: in
B: on
C: from
D: at
A: in
B: on
C: from
D: at
举一反三
- We must find ways to prevent the poisonous gases ________ polluting the air. A: in B: with C: from D: of
- They took _______ measures to prevent poisonous gases from escaping.
- Electric vehicles will save a lot of air ______ because there will be no emission of CO2 in the air. A: pollute B: polluted C: pollution D: polluting
- The(poison) ___ gases from the cars have polluted the air.
- One of the ways to reduce the amount of greenhouse gases that we put into the air is to buy products that don't use as much energy.