What makes the better choice?

[Diana Losman]

English Language Tests, Intermediate level

ESL/EFL Test #118 "Verb Tenses", question 2

That ......... my business.

(a) is
(b) will be
(c) was
(d) had

English Language Tests, Intermediate level

ESL/EFL Test #118 "Verb Tenses", answer 2

That is my business.

Correct answer: (a) is
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(a) is possible
(c) is possible too
What makes the better choice?
Diana Losman

[Alan]

Hi,
You need is here because it is in answer to the previous question: Where are you going tonight?

Alan
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English as a Second Language
You can read my ESL story Party Conferences