Question

Renu is very sad. Her dog ………yesterday. (disappear)​

Answer 1

Renu is very sad. Her dog disappeared yesterday.

Answer 2

Answer:

Renu is very sad. Her dog disappeared yesterday.

Explanation:

If the two sentences were joined with a conjunction, then the event that occured first,i.e., dog disappeared, will have the perfect tense.

∴ Renu is very sad because her dog had disappeared yesterday.