Test is the singular of TESt
The possessive form for the singular noun driver is driver's.Example: I passed the test and got my driver's license today.
Class is a singular noun so add -'s. The class's test.
The singular possessive is test's.
The singular form of the demonstrative pronoun 'these' is this.
The singular form of feet is foot.
The singular form of "hypothysis" is "hypothesis."
In the sentence, "Sandra is worried about her upcoming English test", the helping verb is "is", the third person singular form of "to be". In this instance it is helping to form a passive voice form of "worry".
The singular form is ombudsman.
it is already in its singular form.
The singular form is hilum.
The singular form is money.
The singular form is cuff.