She said she had some trouble ___________ her homework.
---I lost my school ID card.---You can ask the teacher____ it, but you must call her____36404564 first.
---______is this girl?---she is my sister.----______do you spell “sister”?---S-I-S-T-E-R.
______your schoolbag? It’s on the sofa.
These two are on the chair.
Are these books? No, they aren’t.. They are______.