Question

My sister
medicine. She
four years already
The correct verb forms to be filled in the blank are
A) studied, will complete B) is studying has completed
is studying complete D) was studying had completed​

Answer 1

My sister was studying medicine. She had completed four years already.

Explanation:

• The correct option is D) was studying had completed​.
• 'Was studying' is the past continuous tense and 'had completed' is the past perfect tense.
• Past continuous tense denotes the action that was continuing in the past. It presents the action that was still ongoing at a certain time in the past.
• Past perfect tense denotes the action that occurred before some action took place. It presents the action that was completed.

Learn more:

Simple past or past continuous tense.​

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Explain about simple past tense and past perfect tense

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Answer 2

My sister was studying medicine. She had completed four years already.