Question

Exercise 1 Underline the correct term in each sentence.

It (is not, ain’t) incorrect to omit the leading zero on some decimal numbers.

Answer 1

is not

Step-by-step explanation:

'It' is a singular noun, so a singular verb should follow it. Hence, the answer is 'is not'.

However, 'ain't' is a slang and not appropriate for formal sentences, even though that option is technically grammatically correct.