Question

9. He________
gone to work
yesterday. John was there all
day and nobody saw him.
A. wasn't have
B. mustn't have
C. can't have​

Answer 1

The answer is B. Mustn’t have

Answer 2

Answer:

its c

Explanation:

can means possible and john didnt see him so it's not possible. Mustn't have just doesnt sound right