Question

Fill in the blank with the most appropriate option.
Don't disturb me. I _________ my homework.
a) do
b) did
c) am doing
d) none of these

Answer 1

Hint:A verb is used to convey action, in the sentence. It has three main forms with respect to time, namely - Past, Present, and Future.

Complete answer:
From the hint given to us, we understand what a verb is. It has three main forms with respect to time, namely - Past, Present, and Future. The past is used to convey a time period that is already over. For example She played cricket.The present is used to convey the current time frame. For example She plays cricket. The future is used to convey a later period of time. For example She will play cricket. Thus, we can infer that we have to fill the blank with an appropriate verb form that fits the context of the sentence.
Do is a verb in the simple present tense. However, it does not fit the context of the sentence as the nature of the sentence indicates activity in progression. Hence, option A is not the correct answer.
Did is a verb which is a simple past form of do. We observe that it does not fit the sentence correctly as the sentence is not based upon a period of time that is already over or in the past. Hence, option B is not the correct answer.
Am doing is a verb which is a present continuous form of do. We observe that it fits the sentence correctly. The first sentence indicates an instruction for an activity which is in progression. Hence, option C is the correct answer.

Note:
The simple present tense is used for an activity that recurs or is generalized in nature. Present continuous is used for an activity that is in progression at the given moment.