That versus those

[osama]

English Language Tests, Intermediate level

ESL/EFL Test #170 "this, that, these, those", question 8

The pilot calmly steered us through ......... big cloud.

(a) this
(b) that
(c) these
(d) those

English Language Tests, Intermediate level

ESL/EFL Test #170 "this, that, these, those", answer 8

The pilot calmly steered us through that big cloud.

Correct answer: (b) that

Your answer was: incorrect
The pilot calmly steered us through those big cloud.
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could you tell me why that not those ?

osama

[Conchita]

Only one cloud is mentioned, so the singular 'that' is needed. You could use 'those' for more than one cloud: those big clouds.