BB SC Test 9 - Sec 4 - 07

[computer-bot]

The startling finding that variations in the rate of Earth's rotation depend to an ______ degree on the weather has necessitated a complete _______ of the world's time keeping method.

a) unexpected .... overhaul
b) anticipated ..... recalibration
c) indeterminate .... rejection
d) unobservable .... review
e) estimated .....acceptance

OA is

SPOILER: A

CB

[Mervin2008]

It has to be A,since the only other option is B but the first choice is eliminated by the words "depend to an ______ degree " implying its not known

[Makumajon]

The finding is startling. So you were not ready to hear about. And now you need to do something on time-keeping method.

unexpected, unobservable are OK in the first blank. Indeterminate...rejected makes an illogical sentence.

review is not contributing much to the sentence.
Dependence of earth rotation on weather is unobservable, and you are just reviewing your time-keeping methods.

Overhaul is more comprehensive in meaning. And unexpected directly echos unexpected.