Question

The boss had many complaints-------Shyam.

Answer 1

The boss had many complaints about Shyam and hope the student can find out and get best ideas to fill out the exact answer for the given fill in the blanks.

Here “about” is right choice for the student to get ideas and deliver meaning full sentence in a fine manner.

Hope this answer helpful for the student.

Answer 2

Answer:

the boss had many complaints against shyam