Question

The first innings _______ very interesting (was/were)?

Answer 1

Answer:

was is the answer.

Actually confusion occurs because innings appears to be plural but it is singular .

Answer 2

The blank can be filled with the word 'was'.

So, correct option is 'was' and correct sentence will be:

The first innings was very interested.

There is a very interesting thing that inning and innings both can be used as singular.

In baseball and cricket, singular is used differently. But as first is used so it denotes it's singular so was is the better option.