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In the national English language test (equivalent to A-levels), exam sitters were supposed to fill the spaces in the sentences with a word of some grammatical function.
One such sentence read: 'Some major junctions even have a special set of traffic lights for cyclists, allowing ___ a head start ahead of motorists.'
The key of the test says the correct answer is 'them'. However, what I did choose was 'for'. Is 'allow for something' a reasonable construction in this case?