wHICH OF THESE SENTENCES IS GRAMMATICALLY CORRECT?

A. She should of typed the report.
B. Should you get a pencil off her?
c. The new salesclerk waited on me.
D. They had to wait for John and I.

C, I think

Si, it is c.

Being unable to type the letter, the boss fired me. whats wrong with this sentence?

D

The correct sentence should be "The boss fired me because I was unable to type the letter." The original sentence is grammatically incorrect because it is using a participial phrase (being unable to type the letter) to begin the sentence without an appropriate connection or conjunction to the main clause. By adding the conjunction "because" in the revised sentence, it properly connects the reason for the boss firing the person.