She ___ speak Mandarin fluently because she has been learning it for years.

John ___ submit the task by the end of the day.

Tom ___ swim when he was three years old.

You ___ forget to wish your friend a happy birthday.

They ___ arrive early if they want to secure good seats.

She ___ finish her homework before watching TV.

We ___ buy a present for Grandma's birthday.

He ___ have an umbrella with him; it might rain later.

Jane ___ play the piano when she was just five years old.

You ___ be careful when crossing the street.

Students ___ arrive on time for the exam.

You ___ forget your keys; it’s essential to lock the door.

They ___ go to bed early if they want to be well-rested for tomorrow’s hike.

He ___ help his sister with her homework; it’s his responsibility as an older brother.