In the case of acid rain, significant reductions in sulfur dioxide have not corresponded to ecological changes due to continuing high levels of nitrogen.
Significant reductions in sulfur dioxide haven't cause ecological changes to occur.
Significant reductions in sulfur dioxide have caused ecological changes to occur.
A teacher and his students are outside playing.
Arrangements for attestation should provide access to documents.
I was about to turn on the air conditioning because it was still sixty-five in the evening.
The young girl took a sip of her drink on a beautiful day.
The King of Judah!
The river spikes would not be enough.