In this task you are given a sentence. You must judge whether subject of the main clause is singular or plural. Label the instances as "Singular" or "Plural" based on your judgment.

The deep boom of the two shots, which had been batting to and fro among the mountains, died away.
Singular

" How are your cousins doing ? "
Plural

There behind her was the mass of guards that had just been on the third floor.

Singular