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Windyjolt Posted 16 years ago
Grammar

Pronouns

Radio astronomy is a science to_____an exact birth date, December 1932, can be assigned, for_____was the date receiving radio waves from space.
a)what/that
b)which/this

The answer is "b" but i couldnt understand the first part how can i tell apart which and what in this sentence?
  

Top answer

' to what a + noun' is not grammatical here; that is all I can say.

  • ' to what a + noun' is not grammatical here; that is all I can say.
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3 Answers
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'to what a + noun' is not grammatical here; that is all I can say.
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windyjoltRadio astronomy is a science to__an exact birth date, December 1932, can be assigned, for__was the date receiving radio waves from space.
a)what/that
b)which/this

An exact birth date can be assigned to radio astronomy.
An exact birth date can be assigned to it.
an exact birth date can be assigned [to which
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Only which and whom can be used as a relative pronoun after a preposition -- not what.
Jim, can I ask you how it works in this structure? (This is what stymied me when I was considering the original question)-- The crop was decimated, but by what (it was eaten) I do not know.

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