on the other hand

[Kati Svaby]

English Grammar Tests, Elementary Level

ESL/EFL Test #272 "Gerund and Infinitive Practice (11)", question 4

David allows ......... in his house. My children, on the other, are not allowed to use bad language in our home.

(a) swears
(b) to swear
(c) swore
(d) swearing

English Grammar Tests, Elementary Level

ESL/EFL Test #272 "Gerund and Infinitive Practice (11)", answer 4

David allows swearing in his house. My children, on the other, are not allowed to use bad language in our home.

Correct answer: (d) swearing
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David allows swearing in his house. My children, on the other, are not allowed to use bad language in our home.

Here why isn't good the infinitive? I thought he allows them to swear sometimes. Or they are swearing always? See my interpretation in the 3.question.
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Don't walk behind me; I may not lead. Don't walk in front of me; I may not follow. Just walk beside me and be my friend.

[Mister Micawber]

I have repaired the typos in this test.
_________________
Native English teacher at Mister Micawber's

[Kati Svaby]

Hello Mister Micawber,

Many thanks for the correction:
Kati Svaby
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Don't walk behind me; I may not lead. Don't walk in front of me; I may not follow. Just walk beside me and be my friend.