Neither /nor

She ______ replied my email, _____ acknowledge my message.

_______ the client's request ___ the competitor's proposal meet our standards.

Students shouldn't be late to class/ shouldn't forget to bring their homework.

Throwing your trash onto the sidewalk isn't hygienic / isn't considerate to others.

You dont have to wear a suit to the sales meeting. / Dont have to wear a tie to the sales meeting.