Smile to the world, _______ the world will smile back to you.
Tom likes reading books when he ________.
---________ doesn’t Jim look happy today?---He _______ happy because he doesn’t do well in his English.
--________ your friend?-- He is OK.
— Don’t shout in the hospital. —__________.
---______is this girl?---she is my sister.----______do you spell “sister”?---S-I-S-T-E-R.