Answer:
In order to fill in the blank with the correct auxiliary verb, let's understand what auxiliary verbs are. Auxiliary verbs are used to form tenses, moods and forms of other verbs. For example - I am a woman. Here, 'am' is an auxiliary verb as it indicates that the sentence is in simple present tense.
NOTE: 'Lost' indicates that the sentence is in simple past tense. 'Father' is the singular subject which requires the singular form of an auxiliary verb.
Option B - 'Were' is the plural form of the auxiliary verb used with a plural subject. As the subject in the given sentence is singular, we can't use 'were'. Hence, option A is incorrect.
Option C - 'Are' is the plural form of the verb which indicates present tense. As we need an auxiliary verb in past tense and in the singular form, we can't use 'are' here. Hence, option C is incorrect.
Option D - 'Do' is the plural form of the auxiliary verb, and it indicates the state of 'doing' something and not the state of being. Also, as it is in the present tense, we can't use 'do' here. Hence, option D is incorrect.
Option A - 'Was' is the singular form of the auxiliary verb used with a singular subject. It indicates the subject's state of being in the past tense. Hence, we can use 'was' here. Thus option A is the correct answer.
'My father's wallet was lost.'
<span>A origem do atrito, está no contato entre duas superficies. Apesar de duas superficies parecerem super lisas e polidas, microscopicamente, há falhas na sua superficie. Quando duas superficies estao em contato, essas falhas produzem o atrito.</span>
1. Dans une boulangerie on vend du pain.
2. Oui, je réponds aux questions en classe.
OR : Non, je ne réponds pas aux questions en classe.
3. Les personnes attendent le train pour partir en vacances.
4. Le weekend je rends visite à mes cousins.
5. Oui, elle entend la musique dans la maison.
OR : Non, elle n'entend pas la musique dans la maison.
6. Non, je ne perds pas mon match de tennis.