I don’t know ______ with this problem. It’s too hard.
It is 7 o’clock now. It’s time ________.
If you can’t ___________ English, you can ____________ it in Chinese.
---There are some pictures ________ the wall. What ________ can you see? ---I can see two windows ________ the wall.
–How old is your sister? –She is ________girl.
--- ________ is your Maths teacher? ----The man ________ a white shirt.