The fossil fuel once burned will react a lot of toxic gas,like sulfur dioxide.这句话哪错了?

问题描述:

The fossil fuel once burned will react a lot of toxic gas,like sulfur dioxide.这句话哪错了?

once being burned

like后加s

Once the fossil fuel burn, it will react a lot of toxic gas,like sulfur dioxide.

like 用的不好,改为:such as