Question

When the Principal entered the class, a student………. on the blackboard.

(a) Wrote 

(b) was writing 

(c) writes 

(d) is writing 

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Answer 1

a and b option can be the answer

Answer 2

Answer:

When the Principal entered the class, a student was writing on the blackboard.

Explanation:

The given sentence clearly states that the sentence is in Paste tense. We can justify that this sentence is in past tense by noting down the verb. One of verb is “entered” where “ed” depicts past tense. So the continuation of the sentence will accept only past tense.  

Options (C) “writes” and Option (d) is writing are present tense and present continuous. Though wrote is past tense it will not suit here. Option (b) “was writing”, were was represent past tense will suit the sentence.