Question

he_____ (be) too busy in the office yesterday​

Answer 1

Answer:

was is the answer

hope this may help u

keep smiling

good nyt

Answer 2

Answer:

He was too busy in the office yesterday​

=> was is the correct answer for your question

Explanation :

In the question, we must observe the keywords given

Here, the keyword given is 'yesterday' which indicates the past.

As 'was' is the past form of 'be' for singulars, was is the answer for the given question

❖ Extra information

⟡ Verb Forms of 'be' :

=> Present tense verb forms of 'be' are : is, am, are

=> Past tense verb forms of 'be' are : was, were

=> Future tense verb forms of 'be' are : will be, shall be

Hope it helps!